Ejemplo n.º 1
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 public LocalizationEngine(IEnumerable <PeptideSpectralMatch> allResultingIdentifications, List <ProductType> lp, MsDataFile myMsDataFile, CommonParameters commonParameters, List <string> nestedIds) : base(commonParameters, nestedIds)
 {
     AllResultingIdentifications = allResultingIdentifications;
     ProductTypes      = lp;
     MyMsDataFile      = myMsDataFile;
     DissociationTypes = DetermineDissociationType(lp);
 }
Ejemplo n.º 2
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 public SpectrumForm(MsDataFile msDataFile)
     : base(msDataFile.Workspace)
 {
     InitializeComponent();
     MsDataFile = msDataFile;
     tbxScanIndex.Leave += (o, e) => ScanIndex = int.Parse(tbxScanIndex.Text);
 }
Ejemplo n.º 3
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        private void resetFilesButton_Click(object sender, RoutedEventArgs e)
        {
            // clear spectra file path
            if ((sender as Button).Name.Equals(resetSpectraFileButton.Name))
            {
                spectraFilePath                  = null;
                spectraFileNameLabel.Text        = "None Selected";
                spectraFileNameLabel.ToolTip     = null;
                resetSpectraFileButton.IsEnabled = false;
            }

            // clear psm file path, psm data, and stat plot
            else
            {
                tsvResultsFilePath               = null;
                psmFileNameLabel.Text            = "None Selected";
                psmFileNameLabel.ToolTip         = null;
                psmFileNameLabelStat.Text        = "None Selected";
                psmFileNameLabelStat.ToolTip     = null;
                resetPsmFileButton.IsEnabled     = false;
                resetPsmFileButtonStat.IsEnabled = false;

                allPsms.Clear();
                filteredListOfPsms.Clear();
                psmsBySourceFile.Clear();
                sourceFilesList.Clear();
                plotViewStat.DataContext = null;
            }

            // clear main plot, base sequence, and properties table
            mainViewModel.Model = null;
            BaseDraw.clearCanvas(canvas);
            propertyView.Clear();
            MsDataFile = null;
        }
 public DataPointAcquisitionEngine(
     List <PeptideSpectralMatch> goodIdentifications,
     MsDataFile myMsDataFile,
     Tolerance mzToleranceForMs1Search,
     int minMS1isotopicPeaksNeededForConfirmedIdentification,
     CommonParameters commonParameters,
     List <(string FileName, CommonParameters Parameters)> fileSpecificParameters,
Ejemplo n.º 5
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        public static void TestFilterKeepsPeaksWithHighestIntensity()
        {
            double[] mzArray  = new double[200];
            double[] intArray = new double[200];

            Random r = new Random();

            for (int i = 0; i < 200; i++)
            {
                mzArray[i]  = (double)(i + 1);
                intArray[i] = (i * Math.Abs(r.Next(1, 100)) + 1d);
            }

            List <double> l = intArray.ToList();

            l.Sort((x, y) => y.CompareTo(x));
            l = l.Take(100).ToList();

            FilteringParams f = new FilteringParams(100, null, null, null, false, false, false);

            MsDataFile.WindowModeHelper(ref intArray, ref mzArray, f, mzArray.Min(), mzArray.Max());

            List <double> myOut = intArray.ToList();

            myOut.Sort((x, y) => y.CompareTo(x));
            Assert.IsTrue(l.SequenceEqual(myOut));
        }
Ejemplo n.º 6
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        public static void TestFilteringPeaksTopN_MultipleWindows(int peaksToKeep, int?nominalWindowWidthDaltons, int peakCount, bool normalize)
        {
            double[] mzArray  = new double[100];
            double[] intArray = new double[100];

            for (int i = 0; i < 100; i++)
            {
                mzArray[i]  = 100d + ((double)i / 100d) * 1900;
                intArray[i] = i;
            }

            FilteringParams f = new FilteringParams(peaksToKeep, null, nominalWindowWidthDaltons, null, normalize, false, false);

            MsDataFile.WindowModeHelper(ref intArray, ref mzArray, f, 100, 2000, false);

            if (nominalWindowWidthDaltons.HasValue)
            {
                Assert.LessOrEqual((decimal)mzArray.Count(), (decimal)peaksToKeep * (decimal)nominalWindowWidthDaltons);
            }
            else
            {
                Assert.LessOrEqual((decimal)mzArray.Count(), (decimal)peaksToKeep * (decimal)1.0);
            }
            if (normalize)
            {
                Assert.That(50, Is.EqualTo(intArray.Max()).Within(0.1));
            }
        }
Ejemplo n.º 7
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        public bool Run_TdMzCal(InputFile raw_file, List <TopDownHit> topdown_hits)
        {
            all_topdown_hits = topdown_hits.Where(h => h.score > 0).ToList();
            //need to reset m/z in case same td hits used for multiple calibration raw files...
            Parallel.ForEach(all_topdown_hits, h => h.mz = h.reported_mass.ToMz(h.charge));

            high_scoring_topdown_hits = all_topdown_hits.Where(h => h.score >= 40).ToList();
            this.raw_file             = raw_file;

            if (high_scoring_topdown_hits.Count < 5)
            {
                return(false);
            }

            myMsDataFile = Path.GetExtension(raw_file.complete_path) == ".raw" ?
                           ThermoStaticData.LoadAllStaticData(raw_file.complete_path) :
                           null;
            if (myMsDataFile == null)
            {
                myMsDataFile = Mzml.LoadAllStaticData(raw_file.complete_path);
            }
            if (myMsDataFile == null)
            {
                return(false);
            }

            DataPointAquisitionResults dataPointAcquisitionResult = GetDataPoints();

            if (dataPointAcquisitionResult.Ms1List.Count < 10)
            {
                return(false);
            }

            var myMs1DataPoints = new List <(double[] xValues, double yValue)>();

            for (int i = 0; i < dataPointAcquisitionResult.Ms1List.Count; i++)
            {
                //x values
                var explanatoryVariables = new double[4];
                explanatoryVariables[0] = dataPointAcquisitionResult.Ms1List[i].mz;
                explanatoryVariables[1] = dataPointAcquisitionResult.Ms1List[i].retentionTime;
                explanatoryVariables[2] = dataPointAcquisitionResult.Ms1List[i].logTotalIonCurrent;
                explanatoryVariables[3] = dataPointAcquisitionResult.Ms1List[i].logInjectionTime;

                //yvalue
                double mzError = dataPointAcquisitionResult.Ms1List[i].massError;

                myMs1DataPoints.Add((explanatoryVariables, mzError));
            }

            var ms1Model = GetRandomForestModel(myMs1DataPoints);

            CalibrateHitsAndComponents(ms1Model);
            if (Sweet.lollipop.calibrate_raw_files)
            {
                MzmlMethods.CreateAndWriteMyMzmlWithCalibratedSpectra(myMsDataFile, raw_file.directory + "\\" + raw_file.filename + "_calibrated.mzML", false);
            }
            return(true);
        }
Ejemplo n.º 8
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        public static void TestCoIsolation()
        {
            List <DigestionMotif> motifs = new List <DigestionMotif> {
                new DigestionMotif("K", null, 1, null)
            };
            Protease protease = new Protease("CustProtease", CleavageSpecificity.Full, null, null, motifs);

            ProteaseDictionary.Dictionary.Add(protease.Name, protease);
            CommonParameters CommonParameters = new CommonParameters(scoreCutoff: 1, deconvolutionIntensityRatio: 50, digestionParams: new DigestionParams(protease.Name, minPeptideLength: 1));

            var variableModifications = new List <Modification>();
            var fixedModifications    = new List <Modification>();
            var proteinList           = new List <Protein> {
                new Protein("MNNNKNDNK", null)
            };

            var searchModes = new SinglePpmAroundZeroSearchMode(5);

            Proteomics.AminoAcidPolymer.Peptide pep1 = new Proteomics.AminoAcidPolymer.Peptide("NNNK");
            Proteomics.AminoAcidPolymer.Peptide pep2 = new Proteomics.AminoAcidPolymer.Peptide("NDNK");

            var dist1 = IsotopicDistribution.GetDistribution(pep1.GetChemicalFormula(), 0.1, 0.01);

            var dist2 = IsotopicDistribution.GetDistribution(pep2.GetChemicalFormula(), 0.1, 0.01);

            MsDataScan[] Scans          = new MsDataScan[2];
            double[]     ms1intensities = new double[] { 0.8, 0.8, 0.2, 0.02, 0.2, 0.02 };
            double[]     ms1mzs         = dist1.Masses.Concat(dist2.Masses).OrderBy(b => b).Select(b => b.ToMz(1)).ToArray();

            double selectedIonMz = ms1mzs[1];

            MzSpectrum MS1 = new MzSpectrum(ms1mzs, ms1intensities, false);

            Scans[0] = new MsDataScan(MS1, 1, 1, false, Polarity.Positive, 1.0, new MzRange(300, 2000), "first spectrum", MZAnalyzerType.Unknown, MS1.SumOfAllY, null, null, "scan=1");

            double[]   ms2intensities = new double[] { 1, 1, 1, 1, 1 };
            double[]   ms2mzs         = new double[] { 146.106.ToMz(1), 228.086.ToMz(1), 229.07.ToMz(1), 260.148.ToMz(1), 342.129.ToMz(1) };
            MzSpectrum MS2            = new MzSpectrum(ms2mzs, ms2intensities, false);
            double     isolationMZ    = selectedIonMz;

            Scans[1] = new MsDataScan(MS2, 2, 2, false, Polarity.Positive, 2.0, new MzRange(100, 1500), "second spectrum", MZAnalyzerType.Unknown, MS2.SumOfAllY, null, null, "scan=2", selectedIonMz, null, null, isolationMZ, 2.5, DissociationType.HCD, 1, null);

            var myMsDataFile = new MsDataFile(Scans, null);

            var listOfSortedms2Scans = MetaMorpheusTask.GetMs2Scans(myMsDataFile, null, new CommonParameters(deconvolutionIntensityRatio: 50)).OrderBy(b => b.PrecursorMass).ToArray();

            PeptideSpectralMatch[] allPsmsArray = new PeptideSpectralMatch[listOfSortedms2Scans.Length];;
            new ClassicSearchEngine(allPsmsArray, listOfSortedms2Scans, variableModifications, fixedModifications, null, null, null, proteinList, searchModes, CommonParameters, new List <string>()).Run();

            // Two matches for this single scan! Corresponding to two co-isolated masses
            Assert.AreEqual(2, allPsmsArray.Length);

            Assert.IsTrue(allPsmsArray[0].Score > 1);
            Assert.AreEqual(2, allPsmsArray[0].ScanNumber);

            Assert.AreEqual("NNNK", allPsmsArray[0].BaseSequence);
            Assert.AreEqual("NDNK", allPsmsArray[1].BaseSequence);
        }
Ejemplo n.º 9
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        /// <summary>
        /// Uses the boxcar algorithm to merge the boxcar scans in a file, writes a new mzml file to the directory.
        /// </summary>
        /// <param name="file"></param>
        /// <param name="boxcarRanges"></param>
        /// <param name="finalFilePath"></param>
        /// <returns></returns> mergedScans, a list of final merged boxcar scans.
        public static List <MsDataScan> MergeBoxCarScans(MsDataFile file, SetOfBoxcarRanges[] boxcarRanges, string finalFilePath)
        {
            SetOfBoxcarRanges[] bcRanges    = RemoveOverlap(boxcarRanges);
            List <SetOfScans>   scans       = SeparateScans(file);
            List <MsDataScan>   mergedScans = MergeScans(scans, bcRanges);

            // WriteMzmlFile(mergedScans, file, finalFilePath);
            return(mergedScans);
        }
Ejemplo n.º 10
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 public DataPointAcquisitionEngine(
     List <PeptideSpectralMatch> goodIdentifications,
     List <Ms2ScanWithSpecificMass> goodScans,
     MsDataFile myMsDataFile,
     Tolerance precursorMassTolerance,
     Tolerance productMassTolerance,
     int minMS1isotopicPeaksNeededForConfirmedIdentification,
     CommonParameters commonParameters,
     List <(string FileName, CommonParameters Parameters)> fileSpecificParameters,
Ejemplo n.º 11
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 public DataRow(MsDataFile dataFile, RegressionWithOutliers unrefined, IList <string> regressedPeptides)
 {
     MsDataFile        = dataFile;
     Unrefined         = unrefined;
     RegressedPeptides = regressedPeptides;
     if (Unrefined != null)
     {
         Refined = Unrefined.Refine();
     }
 }
Ejemplo n.º 12
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        public bool EnsureMsDataFile(MsDataFile msDataFile, bool alwaysPrompt)
        {
            String errorMessage;

            if (!alwaysPrompt && msDataFile.Workspace.IsRejected(msDataFile))
            {
                return(false);
            }
            if (TryInitMsDataFile(this, msDataFile, out errorMessage))
            {
                return(true);
            }
            if (null == errorMessage)
            {
                return(false);
            }
            DialogResult dialogResult = MessageBox.Show(
                "Unable to open the data file for " + msDataFile.Name + ". " + errorMessage +
                " Do you want to look for this file?",
                Program.AppName, MessageBoxButtons.OKCancel);

            while (dialogResult == DialogResult.OK)
            {
                using (OpenFileDialog fileDialog = new OpenFileDialog
                {
                    Filter = msDataFile.Name + ".*|" + msDataFile.Name + ".*"
                             + "|All Files|*.*",
                    Title = "Browser for " + msDataFile.Name,
                    InitialDirectory = Settings.Default.RawFilesDirectory
                })
                {
                    fileDialog.ShowDialog(this);

                    if (String.IsNullOrEmpty(fileDialog.FileName))
                    {
                        break;
                    }
                    Workspace.SetDataDirectory(Path.GetDirectoryName(fileDialog.FileName));
                }
                if (TryInitMsDataFile(this, msDataFile, out errorMessage))
                {
                    return(true);
                }
                if (null == errorMessage)
                {
                    return(false);
                }
                dialogResult =
                    MessageBox.Show(errorMessage + " Do you want to keep looking for a different file?", Program.AppName,
                                    MessageBoxButtons.OKCancel);
            }
            Workspace.RejectMsDataFile(msDataFile);
            return(false);
        }
Ejemplo n.º 13
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        public static void Test_ChargeDeconv()
        {
            string     FilepathMZML = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Data/2076.mzML");
            MsDataFile file         = Mzml.LoadAllStaticData(FilepathMZML, null);
            var        scans        = file.GetAllScansList();

            DeconvolutionParameter deconvolutionParameter = new DeconvolutionParameter();

            Stopwatch stopwatch0 = new Stopwatch();

            stopwatch0.Start();
            var spectrum = new MzSpectrumXY(scans.First().MassSpectrum.XArray, scans.First().MassSpectrum.YArray, true);

            stopwatch0.Stop();

            Stopwatch stopwatch_iso = new Stopwatch();

            stopwatch_iso.Start();
            var iso = IsoDecon.MsDeconv_Deconvolute(spectrum, spectrum.Range, deconvolutionParameter);

            stopwatch_iso.Stop();

            Stopwatch stopwatch1 = new Stopwatch();

            stopwatch1.Start();
            var x = ChargeDecon.FindChargesForScan(spectrum, deconvolutionParameter);

            stopwatch1.Stop();

            //Stopwatch stopwatch2 = new Stopwatch();
            //stopwatch2.Start();
            var stopwatch2 = Stopwatch.StartNew();
            var x2         = ChargeDecon.QuickFindChargesForScan(spectrum, deconvolutionParameter);

            stopwatch2.Stop();

            //    Stopwatch stopwatch3 = new Stopwatch();
            //    stopwatch3.Start();
            //    int indUp = spectrum.ExtractIndicesByY().First();
            //    double mass_up = spectrum.XArray[indUp];
            //    var highest = ChargeDecon.FindChargesForPeak(spectrum, indUp, new DeconvolutionParameter());
            //    stopwatch3.Stop();

            //    var Parameters = Program.AddParametersFromFile("");
            //    List<double> masses = highest.Select(p => p.Value.Mz).ToList();
            //    string dynamicTargets;
            //    string dynamicMaxITs;

            //    Stopwatch stopwatch4 = new Stopwatch();
            //    stopwatch4.Start();
            //    var test = BoxCarScan.BuildDynamicBoxString(Parameters, masses, out dynamicTargets, out dynamicMaxITs);
            //    stopwatch4.Stop();
            //    Assert.That(test == "[(400.0,522.8),(524.8,542.2),(544.2,563.1),(565.1,585.6),(587.6,610.0),(612.0,636.5),(638.5,665.4),(667.4,697.1),(699.1,732.0),(734.0,770.5),(772.5,813.3),(815.3,861.1),(863.1,915.0),(917.0,976.0),(978.0,1045.7),(1047.7,1126.1),(1128.1,1200.0)]");
        }
Ejemplo n.º 14
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        public static void Test_RealDataDeconv()
        {
            string     FilepathMZML = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Data/20170802_QEp1_FlMe_SA_BOX0_SILAC_BoxCar_SLICED.mzML");
            MsDataFile file         = Mzml.LoadAllStaticData(FilepathMZML, null);
            var        scans        = file.GetAllScansList();

            var test = new MzSpectrumXY(scans.First().MassSpectrum.XArray, scans.First().MassSpectrum.YArray, true);


            var ms1scans = scans.Where(p => p.MsnOrder == 1).ToList();
            DeconvolutionParameter deconvolutionParameter = new DeconvolutionParameter();
        }
Ejemplo n.º 15
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        private async void loadFilesButton_Click(object sender, RoutedEventArgs e)
        {
            // check for validity
            propertyView.Clear();
            if (spectraFilePath == null)
            {
                MessageBox.Show("Please add a spectra file.");
                return;
            }

            if (tsvResultsFilePath == null)
            {
                MessageBox.Show("Please add a search result file.");
                return;
            }

            // load the spectra file
            (sender as Button).IsEnabled      = false;
            selectSpectraFileButton.IsEnabled = false;
            selectPsmFileButton.IsEnabled     = false;
            resetSpectraFileButton.IsEnabled  = false;
            resetPsmFileButton.IsEnabled      = false;
            prgsFeed.IsOpen  = true;
            prgsText.Content = "Loading spectra file...";

            // Add EventHandlers for popup click-in/click-out behaviour
            Deactivated += new EventHandler(prgsFeed_Deactivator);
            Activated   += new EventHandler(prgsFeed_Reactivator);

            var slowProcess = Task <MsDataFile> .Factory.StartNew(() => spectraFileManager.LoadFile(spectraFilePath, new CommonParameters(trimMsMsPeaks: false)));

            await slowProcess;

            MsDataFile = slowProcess.Result;

            // load the PSMs
            this.prgsText.Content = "Loading PSMs...";
            LoadPsms(tsvResultsFilePath, false);
            DisplayLoadedAndFilteredPsms();

            // done loading - restore controls
            this.prgsFeed.IsOpen = false;

            // Remove added EventHandlers
            Deactivated -= new EventHandler(prgsFeed_Deactivator);
            Activated   -= new EventHandler(prgsFeed_Reactivator);

            (sender as Button).IsEnabled      = true;
            selectSpectraFileButton.IsEnabled = true;
            selectPsmFileButton.IsEnabled     = true;
            resetSpectraFileButton.IsEnabled  = true;
            resetPsmFileButton.IsEnabled      = true;
        }
Ejemplo n.º 16
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        // Grouping the scans in the file

        /// <summary>
        /// Given a file, reads through the scans and groups them into SetOfScans objects, each containing one or more full ms1 scans and the corresponding boxcar scans.
        /// Discards all ms2 scans (although the SetOfScans object also has a list to hold these, if you wanted to include them).
        /// This method includes many comments which can be uncommented for debugging to write information to the console.
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns> list of SetOfScans objects, each SetOfScans contains one full ms1 scan and its corresponding boxcar scans.
        public static List <SetOfScans> SeparateScans(MsDataFile file)
        {
            List <SetOfScans> sorted = new List <SetOfScans>();

            // Get only the ms1 and boxcar scans (discard ms2):
            var ms1scans = file.GetMS1Scans().ToList();
            //Console.WriteLine("Number of ms1scans (full ms and boxcar method): " + ms1scans.Count);

            // Initialize variables:

            MsDataScan current       = ms1scans.ElementAt(0);
            string     currentFilter = current.ScanFilter;
            //Console.WriteLine("first scan filter: " + currentFilter);

            MsDataScan next       = ms1scans.ElementAt(1);
            string     nextFilter = next.ScanFilter;
            //Console.WriteLine("next scan filter: " + nextFilter);

            SetOfScans set = new SetOfScans();

            // Loop through to group the scans. This should create as many SetOfScans objects as there are boxes (specified in the setup of the scan).
            for (int i = 0; i < ms1scans.Count; i++)
            {
                if (current.ScanFilter.Contains("Full ms ")) // the space is important! Otherwise this will be recorded as a boxcar scan instead of an ms1
                {
                    set.AddToMs1Scans(current);
                    // Console.WriteLine("Found full ms, added to set");
                }
                // if this boxcar scan has boxcar scans after it
                else if (current.ScanFilter.Contains("Full msx ms") && next.ScanFilter.Contains("Full msx ms"))
                {
                    set.AddToBoxcarScans(current);
                    //Console.WriteLine("Found msx ms, added to set");
                }
                // if this boxcar scan is the last boxcar scan in the set, start a new set
                else if (current.ScanFilter.Contains("Full msx ms") && !next.ScanFilter.Contains("Full msx ms"))
                {
                    set.AddToBoxcarScans(current);
                    //Console.WriteLine("Found last msx ms in set, added to set");
                    sorted.Add(set);
                    //Console.WriteLine("Added set to Sorted");
                    set = new SetOfScans();
                }
                current       = next;
                currentFilter = current.ScanFilter;
                if ((i + 1) < ms1scans.Count) // if there is a next MsDataScan in the file
                {
                    next       = ms1scans.ElementAt(i + 1);
                    nextFilter = next.ScanFilter;
                }
            }
            return(sorted);
        }
Ejemplo n.º 17
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 public DataPointAcquisitionEngine(
     List <PeptideSpectralMatch> goodIdentifications,
     MsDataFile myMsDataFile,
     Tolerance mzToleranceForMs1Search,
     int minMS1isotopicPeaksNeededForConfirmedIdentification,
     CommonParameters commonParameters,
     List <string> nestedIds) : base(commonParameters, nestedIds)
 {
     GoodIdentifications     = goodIdentifications;
     MyMsDataFile            = myMsDataFile;
     MzToleranceForMs1Search = mzToleranceForMs1Search;
     MinMS1isotopicPeaksNeededForConfirmedIdentification = minMS1isotopicPeaksNeededForConfirmedIdentification;
 }
Ejemplo n.º 18
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        private async void loadFilesButton_Click(object sender, RoutedEventArgs e)
        {
            // check for validity
            propertyView.Clear();
            if (spectraFilePath == null)
            {
                MessageBox.Show("Please add a spectra file.");
                return;
            }

            if (psmFilePath == null)
            {
                MessageBox.Show("Please add a search result file.");
                return;
            }

            if (proteinFilePath == null)
            {
                MessageBox.Show("Please add a protein search result file."); //fixme
                return;
            }

            // load the spectra file
            (sender as Button).IsEnabled           = false;
            selectSpectraFileButton.IsEnabled      = false;
            selectPsmFileButton.IsEnabled          = false;
            selectProteinGroupFileButton.IsEnabled = false;
            prgsFeed.IsOpen  = true;
            prgsText.Content = "Loading spectra file...";

            var slowProcess = Task <MsDataFile> .Factory.StartNew(() => spectraFileManager.LoadFile(spectraFilePath, new CommonParameters(trimMsMsPeaks: false)));

            await slowProcess;

            MsDataFile = slowProcess.Result;

            // load protein groups
            this.prgsText.Content = "Loading protein groups...";
            LoadProteinGroups(proteinFilePath);

            // load the PSMs
            this.prgsText.Content = "Loading PSMs...";
            LoadAndDisplayPsms(psmFilePath);

            // done loading - restore controls
            prgsFeed.IsOpen = false;
            (sender as Button).IsEnabled           = true;
            selectSpectraFileButton.IsEnabled      = true;
            selectPsmFileButton.IsEnabled          = true;
            selectProteinGroupFileButton.IsEnabled = true;
        }
Ejemplo n.º 19
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        private DataPointAquisitionResults GetDataAcquisitionResults(MsDataFile myMsDataFile, string currentDataFile, List <Modification> variableModifications, List <Modification> fixedModifications, List <Protein> proteinList, string taskId, CommonParameters combinedParameters, Tolerance initPrecTol, Tolerance initProdTol)
        {
            var fileNameWithoutExtension = Path.GetFileNameWithoutExtension(currentDataFile);
            MassDiffAcceptor searchMode  = initPrecTol is PpmTolerance ?
                                           (MassDiffAcceptor) new SinglePpmAroundZeroSearchMode(initPrecTol.Value) :
                                           new SingleAbsoluteAroundZeroSearchMode(initPrecTol.Value);

            var listOfSortedms2Scans = GetMs2Scans(myMsDataFile, currentDataFile, combinedParameters).OrderBy(b => b.PrecursorMass).ToArray();

            PeptideSpectralMatch[] allPsmsArray = new PeptideSpectralMatch[listOfSortedms2Scans.Length];

            Log("Searching with searchMode: " + searchMode, new List <string> {
                taskId, "Individual Spectra Files", fileNameWithoutExtension
            });
            Log("Searching with productMassTolerance: " + initProdTol, new List <string> {
                taskId, "Individual Spectra Files", fileNameWithoutExtension
            });

            new ClassicSearchEngine(allPsmsArray, listOfSortedms2Scans, variableModifications, fixedModifications, null, null, null, proteinList, searchMode, combinedParameters, this.FileSpecificParameters, new List <string> {
                taskId, "Individual Spectra Files", fileNameWithoutExtension
            }).Run();
            List <PeptideSpectralMatch> allPsms = allPsmsArray.Where(b => b != null).ToList();

            allPsms = allPsms.OrderByDescending(b => b.Score)
                      .ThenBy(b => b.PeptideMonisotopicMass.HasValue ? Math.Abs(b.ScanPrecursorMass - b.PeptideMonisotopicMass.Value) : double.MaxValue)
                      .GroupBy(b => (b.FullFilePath, b.ScanNumber, b.PeptideMonisotopicMass)).Select(b => b.First()).ToList();

            new FdrAnalysisEngine(allPsms, searchMode.NumNotches, CommonParameters, this.FileSpecificParameters, new List <string> {
                taskId, "Individual Spectra Files", fileNameWithoutExtension
            }).Run();

            List <PeptideSpectralMatch> goodIdentifications = allPsms.Where(b => b.FdrInfo.QValueNotch < 0.001 && !b.IsDecoy && b.FullSequence != null).ToList();

            if (!goodIdentifications.Any())
            {
                return(new DataPointAquisitionResults(null, new List <PeptideSpectralMatch>(), new List <LabeledDataPoint>(), new List <LabeledDataPoint>(), 0, 0, 0, 0));
            }

            DataPointAquisitionResults currentResult = (DataPointAquisitionResults) new DataPointAcquisitionEngine(
                goodIdentifications,
                myMsDataFile,
                initPrecTol,
                CalibrationParameters.MinMS1IsotopicPeaksNeededForConfirmedIdentification,
                CommonParameters,
                this.FileSpecificParameters,
                new List <string> {
                taskId, "Individual Spectra Files", fileNameWithoutExtension
            }).Run();

            return(currentResult);
        }
Ejemplo n.º 20
0
        public static void Test_FragmentMesh()
        {
            string     FilepathMZML = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Data/2076.mzML");
            MsDataFile file         = Mzml.LoadAllStaticData(FilepathMZML, null);
            var        scans        = file.GetAllScansList();

            DeconvolutionParameter deconvolutionParameter = new DeconvolutionParameter();
            var spectrum = new MzSpectrumXY(scans.First().MassSpectrum.XArray, scans.First().MassSpectrum.YArray, true);

            var CEs = ChargeDecon.FindChargesForScan(spectrum, deconvolutionParameter);

            var mesh = CEs.First().mzs_box;

            Assert.That(mesh.Count() == 3);
        }
Ejemplo n.º 21
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        public CalibrationEngine(MsDataFile myMSDataFile, DataPointAquisitionResults datapoints, CommonParameters commonParameters, List <string> nestedIds) : base(commonParameters, nestedIds)
        {
            MyMsDataFile = myMSDataFile;
            Datapoints   = datapoints;

            // set the random seed based on raw file properties
            if (MyMsDataFile.SourceFile != null && !string.IsNullOrEmpty(MyMsDataFile.SourceFile.CheckSum))
            {
                RandomSeed = MyMsDataFile.SourceFile.CheckSum.GetHashCode();
            }
            else
            {
                RandomSeed = MyMsDataFile.NumSpectra;
            }
        }
Ejemplo n.º 22
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        public static bool TryInitMsDataFile(IWin32Window parent, MsDataFile msDataFile, out string errorMessage)
        {
            bool   success = false;
            string message = null;

            using (var longWaitDialog = new LongWaitDialog(parent, Program.AppName))
            {
                new LongOperationBroker(broker =>
                {
                    broker.UpdateStatusMessage(string.Format("Reading retention times for {0}", msDataFile.Name));
                    success = MsDataFileUtil.TryInitMsDataFile(msDataFile.Workspace, msDataFile, broker.CancellationToken, out message);
                }, longWaitDialog).LaunchJob();
            }
            errorMessage = message;
            return(success);
        }
Ejemplo n.º 23
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        public static void BU_dynamicBoxCarRange()
        {
            string     FilepathMZML = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Data/20170802_QEp1_FlMe_SA_BOX0_SILAC_BoxCar_SLICED.mzML");
            MsDataFile file         = Mzml.LoadAllStaticData(FilepathMZML, null);
            var        scans        = file.GetAllScansList();

            var        spectrum   = new MzSpectrumXY(scans.First().MassSpectrum.XArray, scans.First().MassSpectrum.YArray, true);
            Parameters parameters = Program.AddParametersFromFile("");
            var        isos       = IsoDecon.MsDeconv_Deconvolute(spectrum, spectrum.Range, parameters.DeconvolutionParameter);

            List <List <Tuple <double, double, double> > > Boxes = new List <List <Tuple <double, double, double> > >();

            BoxCarScan.GenerateDynamicBoxes_BU(isos, parameters, Boxes);

            Assert.That(Boxes.Count == 2);
        }
Ejemplo n.º 24
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 private void SaveChromatograms(ICollection <AnalysisChromatograms> analyses, MsDataFile msDataFile)
 {
     using (ISession session = workspace.OpenWriteSession())
     {
         ITransaction transaction = session.BeginTransaction();
         foreach (AnalysisChromatograms analysis in analyses)
         {
             var dbPeptideAnalysis = session.Get <DbPeptideFileAnalysis>(analysis.PeptideFileAnalysis.Id);
             if (dbPeptideAnalysis == null)
             {
                 continue;
             }
             dbPeptideAnalysis.Times            = analysis.Times.ToArray();
             dbPeptideAnalysis.ScanIndexes      = analysis.ScanIndexes.ToArray();
             dbPeptideAnalysis.HasChromatograms = true;
             session.Update(dbPeptideAnalysis);
             var dbChromatogramDict = dbPeptideAnalysis.GetChromatogramDict();
             foreach (Chromatogram chromatogram in analysis.Chromatograms)
             {
                 DbChromatogram dbChromatogram;
                 if (!dbChromatogramDict.TryGetValue(chromatogram.MzKey, out dbChromatogram))
                 {
                     dbChromatogram = new DbChromatogram
                     {
                         PeptideFileAnalysis = dbPeptideAnalysis,
                         MzKey = chromatogram.MzKey,
                     };
                 }
                 dbChromatogram.IntensitiesBytes = ArrayConverter.ToBytes(chromatogram.Intensities.ToArray());
                 dbChromatogram.PeakMzsBytes     = ArrayConverter.ToBytes(chromatogram.PeakMzs.ToArray());
                 dbChromatogram.Mz = chromatogram.Mz;
                 session.SaveOrUpdate(dbChromatogram);
             }
         }
         if (msDataFile != null)
         {
             msDataFile.MsDataFileData.Save(session);
         }
         transaction.Commit();
     }
     foreach (var analysis in analyses)
     {
         Debug.Assert(_activePeptideFileAnalysisIds.Contains(analysis.PeptideFileAnalysis.Id.Value));
         analysis.PeptideFileAnalysis.HasChromatograms = true;
     }
 }
Ejemplo n.º 25
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        public static string GetCohort(MsDataFile msDataFile, bool bySample)
        {
            var result = new StringBuilder();

            if (msDataFile.Cohort != null)
            {
                result.Append(msDataFile.Cohort);
            }
            if (bySample && !string.IsNullOrEmpty(msDataFile.Sample))
            {
                if (result.Length > 0)
                {
                    result.Append(" ");
                }
                result.Append(msDataFile.Sample);
            }
            return(result.ToString());
        }
Ejemplo n.º 26
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        public static void TestFilterLowIntensity()
        {
            double[] mzArray  = new double[100];
            double[] intArray = new double[100];

            for (int i = 0; i < 100; i++)
            {
                mzArray[i]  = (double)i;
                intArray[i] = (double)i;
            }

            FilteringParams f = new FilteringParams(null, 0.05, null, null, false, false, false);

            MsDataFile.WindowModeHelper(ref intArray, ref mzArray, f, mzArray.Min(), mzArray.Max());

            //The first five intensities are below 5% and therefore removed.
            Assert.AreEqual(95, intArray.Count());
            Assert.AreEqual(95, mzArray.Count());
        }
Ejemplo n.º 27
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        public static void AnotherSpectralLibrarySearchTestDecoy()
        {
            var              testDir          = Path.Combine(TestContext.CurrentContext.TestDirectory, @"TestData\SpectralLibrarySearch");
            string           myFile           = Path.Combine(testDir, @"slicedMouse.raw");
            MyFileManager    myFileManager    = new MyFileManager(true);
            CommonParameters commonParameters = new CommonParameters(maxThreadsToUsePerFile: 1, scoreCutoff: 1);
            MsDataFile       myMsDataFile     = myFileManager.LoadFile(myFile, commonParameters);

            var variableModifications = new List <Modification>();
            var fixedModifications    = new List <Modification>();
            var proteinList           = new List <Protein> {
                new Protein("QTATIAHVTTMLGEVIGFNDHIVK", "P16858")
            };

            string targetSpectralLibrary = Path.Combine(testDir, @"P16858_target.msp");
            string decoySpectralLibrary  = Path.Combine(testDir, @"P16858_decoy.msp");

            List <string> specLibs = new List <string> {
                targetSpectralLibrary, decoySpectralLibrary
            };

            SpectralLibrary sl = new SpectralLibrary(specLibs);

            var searchModes = new SinglePpmAroundZeroSearchMode(5);

            var listOfSortedms2Scans = MetaMorpheusTask.GetMs2Scans(myMsDataFile, null, new CommonParameters()).OrderBy(b => b.PrecursorMass).ToArray();

            PeptideSpectralMatch[] allPsmsArray = new PeptideSpectralMatch[listOfSortedms2Scans.Length];
            bool writeSpectralLibrary           = false;

            new ClassicSearchEngine(allPsmsArray, listOfSortedms2Scans, variableModifications, fixedModifications, null, null, null,
                                    proteinList, searchModes, commonParameters, null, sl, new List <string>(), writeSpectralLibrary).Run();

            // Single search mode
            Assert.AreEqual(7, allPsmsArray.Length);
            Assert.IsTrue(allPsmsArray[5].Score > 38);
            Assert.AreEqual("VIHDNFGIVEGLMTTVHAITATQK", allPsmsArray[5].BaseSequence);
            Assert.IsTrue(allPsmsArray[5].IsDecoy);

            SpectralLibrarySearchFunction.CalculateSpectralAngles(sl, allPsmsArray, listOfSortedms2Scans, commonParameters);
            Assert.That(allPsmsArray[5].SpectralAngle, Is.EqualTo(0.69).Within(0.01));
        }
Ejemplo n.º 28
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        public static bool TryInitMsDataFile(Workspace workspace, MsDataFile msDataFile, CancellationToken cancellationToken, out String message)
        {
            if (string.IsNullOrEmpty(workspace.GetDataDirectory()))
            {
                message = "Workspace data directory has not been specified";
                return(false);
            }
            var path = workspace.GetDataFilePath(msDataFile.Name);

            if (path == null)
            {
                message = "File could not be found";
                return(false);
            }
            if (msDataFile.HasTimes())
            {
                message = "File exists and has been read before.";
                return(true);
            }
            try
            {
                using (var cMsDataFile = new MsDataFileImpl(path))
                {
                    msDataFile.Init(cancellationToken, cMsDataFile);
                    using (var session = workspace.OpenWriteSession())
                    {
                        session.BeginTransaction();
                        msDataFile.SaveBinary(session);
                        session.Transaction.Commit();
                        message = "Success";
                        return(true);
                    }
                }
            }
            catch (Exception exception)
            {
                ErrorHandler.LogException("MsDataFiles", "Exception trying to open " + path, exception);
                message =
                    "An exception occurred while trying to open the file.  Either the file is corrupted, or the necessary libraries to read this file type have not been installed.";
                return(false);
            }
        }
Ejemplo n.º 29
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        public static bool TryInitMsDataFile(Workspace workspace, MsDataFile msDataFile, String path, out String message)
        {
            if (path == null)
            {
                message = "Location of data file has never been specified.";
                return(false);
            }
            if (!File.Exists(path))
            {
                message = "File does not exist.";
                return(false);
            }

            if (msDataFile.HasTimes())
            {
                message = "File exists and has been read before.";
                return(true);
            }
            try
            {
                using (var cMsDataFile = new MsDataFileImpl(path))
                {
                    msDataFile.Init(path, cMsDataFile);
                    using (var session = workspace.OpenWriteSession())
                    {
                        session.BeginTransaction();
                        msDataFile.Save(session);
                        session.Transaction.Commit();
                        message = "Success";
                        return(true);
                    }
                }
            }
            catch (Exception exception)
            {
                Console.Out.Write(exception);
                message =
                    "An exception occurred while trying to open the file.  Either the file is corrupted, or the necessary libraries to read this file type have not been installed.";
                return(false);
            }
        }
Ejemplo n.º 30
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        public static void TestFilterNumberPeaksPerWindowTenWindows()
        {
            double[] mzArray  = new double[200];
            double[] intArray = new double[200];

            for (int i = 0; i < 200; i++)
            {
                mzArray[i]  = (double)(i + 1);
                intArray[i] = (double)(i + 1);
            }

            FilteringParams f = new FilteringParams(10, null, 20, 10, false, false, false);

            MsDataFile.WindowModeHelper(ref intArray, ref mzArray, f, mzArray.Min(), mzArray.Max());

            Assert.AreEqual(100, intArray.Count());
            Assert.AreEqual(100, mzArray.Count());
            Assert.AreEqual(11, intArray.Min());
            Assert.AreEqual(200, intArray.Max());
            Assert.AreEqual(11, mzArray.Min());
            Assert.AreEqual(200, mzArray.Max());
        }
        public IEnumerable <DeconvolutedEnvelope> Deconvolute(MsDataFile file, string fileName = null, int threads = -1)
        {
            var items = new List <DeconvolutedEnvelope>();

            var scans         = file.GetMS1Scans().ToList();
            int scansComplete = 0;

            Parallel.ForEach(Partitioner.Create(0, scans.Count),
                             new ParallelOptions {
                MaxDegreeOfParallelism = threads
            },
                             (range, loopState) =>
            {
                for (int i = range.Item1; i < range.Item2; i++)
                {
                    var scan = scans[i];

                    var deconvolutedEnvs = Deconvolute(scan).ToList();

                    foreach (var env in deconvolutedEnvs)
                    {
                        env.SpectraFileName = fileName;
                    }

                    lock (items)
                    {
                        items.AddRange(deconvolutedEnvs);
                        scansComplete++;
                    }
                }
            });

            foreach (var item in items.OrderByDescending(p => p.Score))
            {
                // TODO: feature finding
                yield return(item);
            }
        }
Ejemplo n.º 32
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        public bool EnsureMsDataFile(MsDataFile msDataFile, bool alwaysPrompt)
        {
            String errorMessage;
            if (!alwaysPrompt && msDataFile.Workspace.IsRejected(msDataFile))
            {
                return false;
            }
            if (TryInitMsDataFile(this, msDataFile, out errorMessage))
            {
                return true;
            }
            if (null == errorMessage)
            {
                return false;
            }
            DialogResult dialogResult = MessageBox.Show(
                "Unable to open the data file for " + msDataFile.Name + ". " + errorMessage +
                " Do you want to look for this file?",
                Program.AppName, MessageBoxButtons.OKCancel);
            while (dialogResult == DialogResult.OK)
            {
                using (OpenFileDialog fileDialog = new OpenFileDialog
                                                       {
                                                           Filter = msDataFile.Name + ".*|" + msDataFile.Name + ".*"
                                                                    + "|All Files|*.*",
                                                           Title = "Browser for " + msDataFile.Name,
                                                           InitialDirectory = Settings.Default.RawFilesDirectory
                                                       })
                {
                    fileDialog.ShowDialog(this);

                    if (String.IsNullOrEmpty(fileDialog.FileName))
                    {
                        break;
                    }
                    Workspace.SetDataDirectory(Path.GetDirectoryName(fileDialog.FileName));
                }
                if (TryInitMsDataFile(this, msDataFile, out errorMessage))
                {
                    return true;
                }
                if (null == errorMessage)
                {
                    return false;
                }
                dialogResult =
                    MessageBox.Show(errorMessage + " Do you want to keep looking for a different file?", Program.AppName,
                                    MessageBoxButtons.OKCancel);
            }
            Workspace.RejectMsDataFile(msDataFile);
            return false;
        }
Ejemplo n.º 33
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 public static bool TryInitMsDataFile(IWin32Window parent, MsDataFile msDataFile, out string errorMessage)
 {
     bool success = false;
     string message = null;
     using (var longWaitDialog = new LongWaitDialog(parent, Program.AppName))
     {
         new LongOperationBroker(broker=>
                                     {
                                         broker.UpdateStatusMessage(string.Format("Reading retention times for {0}", msDataFile.Name));
                                         success = MsDataFileUtil.TryInitMsDataFile(msDataFile.Workspace, msDataFile, broker.CancellationToken, out message);
                                     }, longWaitDialog).LaunchJob();
     }
     errorMessage = message;
     return success;
 }
Ejemplo n.º 34
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 public bool EnsureMsDataFile(MsDataFile msDataFile)
 {
     return EnsureMsDataFile(msDataFile, false);
 }
Ejemplo n.º 35
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 public DataRow(MsDataFile dataFile, RegressionWithOutliers unrefined, IList<string> regressedPeptides)
 {
     MsDataFile = dataFile;
     Unrefined = unrefined;
     RegressedPeptides = regressedPeptides;
     if (Unrefined != null)
     {
         Refined = Unrefined.Refine();
     }
 }
Ejemplo n.º 36
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 public static string GetCohort(MsDataFile msDataFile, bool bySample)
 {
     var result = new StringBuilder();
     if (msDataFile.Cohort != null)
     {
         result.Append(msDataFile.Cohort);
     }
     if (bySample && !string.IsNullOrEmpty(msDataFile.Sample))
     {
         if (result.Length > 0)
         {
             result.Append(" ");
         }
         result.Append(msDataFile.Sample);
     }
     return result.ToString();
 }
Ejemplo n.º 37
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        private void GenerateChromatograms(MsDataFile msDataFile, List<AnalysisChromatograms> analyses)
        {
            int totalAnalyses = analyses.Count;
            if (totalAnalyses == 0)
            {
                return;
            }
            if (!UpdateProgress(0))
            {
                return;
            }
            analyses = new List<AnalysisChromatograms>(analyses);
            using (var pwizMsDataFileImpl = new MsDataFileImpl(msDataFile.Path))
            {
                var completeAnalyses = new List<AnalysisChromatograms>();
                int totalScanCount = pwizMsDataFileImpl.SpectrumCount;
                double minTime = msDataFile.GetTime(msDataFile.GetSpectrumCount() - 1);
                double maxTime = msDataFile.GetTime(0);
                foreach (var analysis in analyses)
                {
                    minTime = Math.Min(minTime, analysis.FirstTime);
                    maxTime = Math.Max(maxTime, analysis.LastTime);
                }
                int firstScan = msDataFile.FindScanIndex(minTime);
                for (int iScan = firstScan; analyses.Count > 0 && iScan < totalScanCount; iScan++)
                {
                    double time = msDataFile.GetTime(iScan);
                    int progress = (int)(100 * (time - minTime) / (maxTime - minTime));
                    progress = Math.Min(progress, 100);
                    progress = Math.Max(progress, 0);
                    if (!UpdateProgress(progress))
                    {
                        return;
                    }

                    List<AnalysisChromatograms> activeAnalyses = new List<AnalysisChromatograms>();
                    double nextTime = Double.MaxValue;
                    if (msDataFile.GetMsLevel(iScan, pwizMsDataFileImpl) != 1)
                    {
                        continue;
                    }
                    foreach (var analysis in analyses)
                    {
                        nextTime = Math.Min(nextTime, analysis.FirstTime);
                        if (analysis.FirstTime <= time)
                        {
                            activeAnalyses.Add(analysis);
                        }
                    }
                    if (activeAnalyses.Count == 0)
                    {
                        int nextScan = msDataFile.FindScanIndex(nextTime);
                        iScan = Math.Max(iScan, nextScan - 1);
                        continue;
                    }
                    double[] mzArray, intensityArray;
                    pwizMsDataFileImpl.GetSpectrum(iScan, out mzArray, out intensityArray);
                    foreach (var analysis in activeAnalyses)
                    {
                        var points = new List<MsDataFileUtil.ChromatogramPoint>();
                        foreach (var chromatogram in analysis.Chromatograms)
                        {
                            points.Add(MsDataFileUtil.GetIntensity(chromatogram.Mz, mzArray, intensityArray));
                        }
                        analysis.AddPoints(iScan, time, points);
                    }
                    var incompleteAnalyses = new List<AnalysisChromatograms>();
                    foreach (var analysis in analyses)
                    {
                        if (analysis.LastTime <= time)
                        {
                            completeAnalyses.Add(analysis);
                        }
                        else
                        {
                            incompleteAnalyses.Add(analysis);
                        }
                    }
                    if (completeAnalyses.Count > 10)
                    {
                        SaveChromatograms(completeAnalyses, null);
                        completeAnalyses.Clear();
                    }
                    analyses = incompleteAnalyses;
                }
                completeAnalyses.AddRange(analyses);
                SaveChromatograms(completeAnalyses, msDataFile);
                lock(this)
                {
                    _activePeptideFileAnalysisIds.Clear();
                }
            }
        }
Ejemplo n.º 38
0
 private void SaveChromatograms(ICollection<AnalysisChromatograms> analyses, MsDataFile msDataFile)
 {
     using (ISession session = workspace.OpenWriteSession())
     {
         ITransaction transaction = session.BeginTransaction();
         foreach (AnalysisChromatograms analysis in analyses)
         {
             var dbPeptideAnalysis = session.Get<DbPeptideFileAnalysis>(analysis.PeptideFileAnalysis.Id);
             if (dbPeptideAnalysis == null)
             {
                 continue;
             }
             dbPeptideAnalysis.Times = analysis.Times.ToArray();
             dbPeptideAnalysis.ScanIndexes = analysis.ScanIndexes.ToArray();
             dbPeptideAnalysis.HasChromatograms = true;
             session.Update(dbPeptideAnalysis);
             var dbChromatogramDict = dbPeptideAnalysis.GetChromatogramDict();
             foreach (Chromatogram chromatogram in analysis.Chromatograms)
             {
                 DbChromatogram dbChromatogram;
                 if (!dbChromatogramDict.TryGetValue(chromatogram.MzKey, out dbChromatogram))
                 {
                     dbChromatogram = new DbChromatogram
                                          {
                                              PeptideFileAnalysis = dbPeptideAnalysis,
                                              MzKey = chromatogram.MzKey,
                                          };
                 }
                 dbChromatogram.IntensitiesBytes = ArrayConverter.ToBytes(chromatogram.Intensities.ToArray());
                 dbChromatogram.PeakMzsBytes = ArrayConverter.ToBytes(chromatogram.PeakMzs.ToArray());
                 dbChromatogram.Mz = chromatogram.Mz;
                 session.SaveOrUpdate(dbChromatogram);
             }
         }
         if (msDataFile != null)
         {
             msDataFile.MsDataFileData.Save(session);
         }
         transaction.Commit();
     }
     foreach (var analysis in analyses)
     {
         Debug.Assert(_activePeptideFileAnalysisIds.Contains(analysis.PeptideFileAnalysis.Id.Value));
         analysis.PeptideFileAnalysis.HasChromatograms = true;
     }
 }
Ejemplo n.º 39
0
 public DataFileRow(DataFilesForm form, MsDataFile dataFile)
 {
     _form = form;
     _dataFile = dataFile;
 }
Ejemplo n.º 40
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 public static bool InitMsDataFile(Workspace workspace, MsDataFile msDataFile)
 {
     String error;
     return TryInitMsDataFile(workspace, msDataFile, msDataFile.Path, out error);
 }
Ejemplo n.º 41
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        public static bool TryInitMsDataFile(Workspace workspace, MsDataFile msDataFile, String path, out String message)
        {
            if (path == null)
            {
                message = "Location of data file has never been specified.";
                return false;
            }
            if (!File.Exists(path))
            {
                message = "File does not exist.";
                return false;
            }

            if (msDataFile.HasTimes())
            {
                message = "File exists and has been read before.";
                return true;
            }
            try
            {
                using(var cMsDataFile = new MsDataFileImpl(path))
                {
                    msDataFile.Init(path, cMsDataFile);
                    using (var session = workspace.OpenWriteSession())
                    {
                        session.BeginTransaction();
                        msDataFile.Save(session);
                        session.Transaction.Commit();
                        message = "Success";
                        return true;
                    }
                }
            }
            catch (Exception exception)
            {
                Console.Out.Write(exception);
                message =
                    "An exception occurred while trying to open the file.  Either the file is corrupted, or the necessary libraries to read this file type have not been installed.";
                return false;
            }
        }