public void TokenizeWithSeparators() { string dataPath = GetDataPath("wikipedia-detox-250-line-data.tsv"); var data = TextLoader.CreateReader(Env, ctx => ( label: ctx.LoadBool(0), text: ctx.LoadText(1)), hasHeader: true) .Read(dataPath).AsDynamic; var est = new WordTokenizeEstimator(Env, "text", "words", separators: new[] { ' ', '?', '!', '.', ',' }); var outdata = TakeFilter.Create(Env, est.Fit(data).Transform(data), 4); var savedData = new ChooseColumnsTransform(Env, outdata, "words"); var saver = new TextSaver(Env, new TextSaver.Arguments { Silent = true }); var outputPath = GetOutputPath("Text", "tokenizedWithSeparators.tsv"); using (var ch = Env.Start("save")) { using (var fs = File.Create(outputPath)) DataSaverUtils.SaveDataView(ch, saver, savedData, fs, keepHidden: true); } CheckEquality("Text", "tokenizedWithSeparators.tsv"); Done(); }
public void NgramWorkout() { string sentimentDataPath = GetDataPath("wikipedia-detox-250-line-data.tsv"); var data = TextLoader.CreateReader(Env, ctx => ( label: ctx.LoadBool(0), text: ctx.LoadText(1)), hasHeader: true) .Read(sentimentDataPath); var invalidData = TextLoader.CreateReader(Env, ctx => ( label: ctx.LoadBool(0), text: ctx.LoadFloat(1)), hasHeader: true) .Read(sentimentDataPath); var est = new WordTokenizeEstimator(Env, "text", "text") .Append(new TermEstimator(Env, "text", "terms")) .Append(new NgramEstimator(Env, "terms", "ngrams")) .Append(new NgramHashEstimator(Env, "terms", "ngramshash")); // The following call fails because of the following issue // https://github.com/dotnet/machinelearning/issues/969 // TestEstimatorCore(est, data.AsDynamic, invalidInput: invalidData.AsDynamic); var outputPath = GetOutputPath("Text", "ngrams.tsv"); using (var ch = Env.Start("save")) { var saver = new TextSaver(Env, new TextSaver.Arguments { Silent = true }); IDataView savedData = TakeFilter.Create(Env, est.Fit(data.AsDynamic).Transform(data.AsDynamic), 4); savedData = new ChooseColumnsTransform(Env, savedData, "text", "terms", "ngrams", "ngramshash"); using (var fs = File.Create(outputPath)) DataSaverUtils.SaveDataView(ch, saver, savedData, fs, keepHidden: true); } CheckEquality("Text", "ngrams.tsv"); Done(); }
public void TextTokenizationWorkout() { string sentimentDataPath = GetDataPath("wikipedia-detox-250-line-data.tsv"); var data = TextLoader.CreateReader(Env, ctx => ( label: ctx.LoadBool(0), text: ctx.LoadText(1)), hasHeader: true) .Read(sentimentDataPath); var invalidData = TextLoader.CreateReader(Env, ctx => ( label: ctx.LoadBool(0), text: ctx.LoadFloat(1)), hasHeader: true) .Read(sentimentDataPath); var est = new WordTokenizeEstimator(Env, "text", "words") .Append(new CharacterTokenizeEstimator(Env, "text", "chars")) .Append(new KeyToValueEstimator(Env, "chars")); TestEstimatorCore(est, data.AsDynamic, invalidInput: invalidData.AsDynamic); var outputPath = GetOutputPath("Text", "tokenized.tsv"); using (var ch = Env.Start("save")) { var saver = new TextSaver(Env, new TextSaver.Arguments { Silent = true }); IDataView savedData = TakeFilter.Create(Env, est.Fit(data.AsDynamic).Transform(data.AsDynamic), 4); savedData = new ChooseColumnsTransform(Env, savedData, "text", "words", "chars"); using (var fs = File.Create(outputPath)) DataSaverUtils.SaveDataView(ch, saver, savedData, fs, keepHidden: true); } CheckEquality("Text", "tokenized.tsv"); Done(); }
public void TestOldSavingAndLoading() { var data = new[] { new TestClass() { A = "This is a good sentence.", B = new string[2] { "Much words", "Wow So Cool" } } }; var dataView = ComponentCreation.CreateDataView(Env, data); var pipe = new WordTokenizeEstimator(Env, new[] { new WordTokenizeTransform.ColumnInfo("A", "TokenizeA"), new WordTokenizeTransform.ColumnInfo("B", "TokenizeB"), }); var result = pipe.Fit(dataView).Transform(dataView); var resultRoles = new RoleMappedData(result); using (var ms = new MemoryStream()) { TrainUtils.SaveModel(Env, Env.Start("saving"), ms, null, resultRoles); ms.Position = 0; var loadedView = ModelFileUtils.LoadTransforms(Env, dataView, ms); } }
public void WordTokenizeWorkout() { var data = new[] { new TestClass() { A = "This is a good sentence.", B = new string[2] { "Much words", "Wow So Cool" } } }; var dataView = ComponentCreation.CreateDataView(Env, data); var invalidData = new[] { new TestWrong() { A = 1, B = new float[2] { 2, 3 } } }; var invalidDataView = ComponentCreation.CreateDataView(Env, invalidData); var pipe = new WordTokenizeEstimator(Env, new[] { new WordTokenizeTransform.ColumnInfo("A", "TokenizeA"), new WordTokenizeTransform.ColumnInfo("B", "TokenizeB"), }); TestEstimatorCore(pipe, dataView, invalidInput: invalidDataView); Done(); }
public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input) { Contracts.CheckValue(env, nameof(env)); var h = env.Register(RegistrationName); h.CheckValue(args, nameof(args)); h.CheckValue(input, nameof(input)); h.CheckUserArg(Utils.Size(args.Column) > 0, nameof(args.Column), "Columns must be specified"); // To each input column to the WordHashBagTransform, a tokenize transform is applied, // followed by applying WordHashVectorizeTransform. // Since WordHashBagTransform is a many-to-one column transform, for each // WordHashBagTransform.Column we may need to define multiple tokenize transform columns. // NgramHashExtractorTransform may need to define an identical number of HashTransform.Columns. // The intermediate columns are dropped at the end of using a DropColumnsTransform. IDataView view = input; var uniqueSourceNames = NgramExtractionUtils.GenerateUniqueSourceNames(h, args.Column, view.Schema); Contracts.Assert(uniqueSourceNames.Length == args.Column.Length); var tokenizeColumns = new WordTokenizeTransform.ColumnInfo[args.Column.Length]; var extractorCols = new NgramHashExtractorTransform.Column[args.Column.Length]; var colCount = args.Column.Length; List <string> tmpColNames = new List <string>(); for (int iinfo = 0; iinfo < colCount; iinfo++) { var column = args.Column[iinfo]; int srcCount = column.Source.Length; var curTmpNames = new string[srcCount]; Contracts.Assert(uniqueSourceNames[iinfo].Length == args.Column[iinfo].Source.Length); for (int isrc = 0; isrc < srcCount; isrc++) { tokenizeColumns[iinfo] = new WordTokenizeTransform.ColumnInfo(args.Column[iinfo].Source[isrc], curTmpNames[isrc] = uniqueSourceNames[iinfo][isrc]); } tmpColNames.AddRange(curTmpNames); extractorCols[iinfo] = new NgramHashExtractorTransform.Column { Name = column.Name, Source = curTmpNames, HashBits = column.HashBits, NgramLength = column.NgramLength, Seed = column.Seed, SkipLength = column.SkipLength, Ordered = column.Ordered, InvertHash = column.InvertHash, FriendlyNames = args.Column[iinfo].Source, AllLengths = column.AllLengths }; } view = new WordTokenizeEstimator(env, tokenizeColumns).Fit(view).Transform(view); var featurizeArgs = new NgramHashExtractorTransform.Arguments { AllLengths = args.AllLengths, HashBits = args.HashBits, NgramLength = args.NgramLength, SkipLength = args.SkipLength, Ordered = args.Ordered, Seed = args.Seed, Column = extractorCols.ToArray(), InvertHash = args.InvertHash }; view = NgramHashExtractorTransform.Create(h, featurizeArgs, view); // Since we added columns with new names, we need to explicitly drop them before we return the IDataTransform. var dropColsArgs = new DropColumnsTransform.Arguments() { Column = tmpColNames.ToArray() }; return(new DropColumnsTransform(h, dropColsArgs, view)); }
public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input) { Contracts.CheckValue(env, nameof(env)); var h = env.Register(RegistrationName); h.CheckValue(args, nameof(args)); h.CheckValue(input, nameof(input)); h.CheckUserArg(Utils.Size(args.Column) > 0, nameof(args.Column), "Columns must be specified"); // Compose the WordBagTransform from a tokenize transform, // followed by a NgramExtractionTransform. // Since WordBagTransform is a many-to-one column transform, for each // WordBagTransform.Column with multiple sources, we first apply a ConcatTransform. // REVIEW: In order to not get ngrams that cross between vector slots, we need to // enable tokenize transforms to insert a special token between slots. // REVIEW: In order to make it possible to output separate bags for different columns // using the same dictionary, we need to find a way to make ConcatTransform remember the boundaries. var tokenizeColumns = new WordTokenizeTransform.ColumnInfo[args.Column.Length]; var extractorArgs = new NgramExtractorTransform.Arguments() { MaxNumTerms = args.MaxNumTerms, NgramLength = args.NgramLength, SkipLength = args.SkipLength, AllLengths = args.AllLengths, Weighting = args.Weighting, Column = new NgramExtractorTransform.Column[args.Column.Length] }; for (int iinfo = 0; iinfo < args.Column.Length; iinfo++) { var column = args.Column[iinfo]; h.CheckUserArg(!string.IsNullOrWhiteSpace(column.Name), nameof(column.Name)); h.CheckUserArg(Utils.Size(column.Source) > 0, nameof(column.Source)); h.CheckUserArg(column.Source.All(src => !string.IsNullOrWhiteSpace(src)), nameof(column.Source)); tokenizeColumns[iinfo] = new WordTokenizeTransform.ColumnInfo(column.Source.Length > 1 ? column.Name : column.Source[0], column.Name); extractorArgs.Column[iinfo] = new NgramExtractorTransform.Column() { Name = column.Name, Source = column.Name, MaxNumTerms = column.MaxNumTerms, NgramLength = column.NgramLength, SkipLength = column.SkipLength, Weighting = column.Weighting, AllLengths = column.AllLengths }; } IDataView view = input; view = NgramExtractionUtils.ApplyConcatOnSources(h, args.Column, view); view = new WordTokenizeEstimator(env, tokenizeColumns).Fit(view).Transform(view); return(NgramExtractorTransform.Create(h, extractorArgs, view)); }