public static bool isSampleOk(RichTextBox attrBox, SampleColection samplesColection, out string error)
{
if (attrBox.Text == "")
{
error = "You must enter a sample\n";
return(false);
}
var text = attrBox.Text.Trim().Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < text.Length; i++)
{
text[i] = Data.convertDoubleFormat(text[i].Trim());
double result;
bool parsed = double.TryParse(text[i], out result);
if (!parsed)
{
error = "Wrong sample format\n";
return(false);
}
}
int fileSamplesLength = samplesColection.samples.First().attributes.Count;
if (text.Length != fileSamplesLength)
{
error = "There must be the same amount of attributes in attributes filed like in samples in file";
return(false);
}
error = "Ok";
return(true);
}
public DataValidation(SampleColection sampleColection, DataLoader dataLoader, ComboBox comboBox, RichTextBox kBox, RichTextBox attrBox)
{
if (!isDataLoaded(dataLoader, out string dataError))
{
message += dataError;
return;
}
if (!isSampleColectionLoaded(sampleColection, out string sampleColectionError))
{
message += sampleColectionError;
return;
}
if (!isSampleOk(attrBox, sampleColection, out string sampleError))
{
message += sampleError;
return;
}
if (!isCorrectK(kBox, sampleColection, out string kError))
{
message += kError;
return;
}
if (!isMetricChosen(comboBox, out string metricError))
{
message += metricError;
return;
}
isValid = true;
}
public static bool isSampleColectionLoaded(SampleColection sampleColection, out string error)
{
if (sampleColection == null)
{
error = "You must load correct file first";
return(false);
}
error = "Ok";
return(true);
}
public SampleColection copy()
{
SampleColection newSampleColection = new SampleColection(new Data(new string[] { }).dataFromFile);
foreach (Sample sample in samples)
{
newSampleColection.addSample(sample.copy());
}
return(newSampleColection);
}
public static SampleColection normalizeSampleColection(SampleColection sampleColection)
{
SampleColection normalizedSampleColection = new SampleColection(new Data(new string[] { }).dataFromFile);
foreach (Sample sample in sampleColection.samples)
{
var normalizedSample = new Sample(normalizeAttributes(sampleColection, sample.attributes), sample.decision);
normalizedSampleColection.samples.Add(normalizedSample);
}
return(normalizedSampleColection);
}
public static Dictionary <int, double> minAttributes(SampleColection sampleColection, int numberOfAttr)
{
var minAttributes = new Dictionary <int, double>();
double min;
for (int i = 0; i < numberOfAttr; i++)
{
min = findMinAttr(sampleColection, i);
minAttributes.Add(i, min);
}
return(minAttributes);
}
public static Dictionary <int, double> maxAttributes(SampleColection sampleColection, int numberOfAttr)
{
var maxAttributes = new Dictionary <int, double>();
double max;
for (int i = 0; i < numberOfAttr; i++)
{
max = findMaxAttr(sampleColection, i);
maxAttributes.Add(i, max);
}
return(maxAttributes);
}
public static double findMinAttr(SampleColection sampleColection, int attrNumber)
{
double min = sampleColection.samples[0].attributes[attrNumber];
foreach (Sample sample in sampleColection.samples)
{
if (sample.attributes[attrNumber] < min)
{
min = sample.attributes[attrNumber];
}
}
return(min);
}
public static double findMaxAttr(SampleColection sampleColection, int attrNumber)
{
double max = sampleColection.samples[0].attributes[attrNumber];
foreach (Sample sample in sampleColection.samples)
{
if (sample.attributes[attrNumber] > max)
{
max = sample.attributes[attrNumber];
}
}
return(max);
}
public static int maxK(SampleColection sampleColection)
{
var segregatedSamples = sampleColection.segregateSamplesByDecision();
int minAmount = segregatedSamples.First().Value.Count;
foreach (var item in segregatedSamples)
{
if (item.Value.Count < minAmount)
{
minAmount = item.Value.Count;
}
}
return(minAmount);
}
public static List <double> normalizeAttributes(SampleColection sampleColection, List <double> attributes)
{
List <double> normalizedAttributes = new List <double>();
var minDict = new Dictionary <int, double>();
var maxDict = new Dictionary <int, double>();
minDict = minAttributes(sampleColection, attributes.Count);
maxDict = maxAttributes(sampleColection, attributes.Count);
for (int i = 0; i < attributes.Count; i++)
{
normalizedAttributes.Add(normalizeAttribute(attributes[i], minDict[i], maxDict[i]));
}
return(normalizedAttributes);
}
public static bool isCorrectK(RichTextBox kBox, SampleColection sampleColection, out string error)
{
int maxK = KChecker.maxK(sampleColection);
int result;
bool parsed = int.TryParse(kBox.Text, out result);
if (!parsed)
{
error = "K must be an integer\n";
return(false);
}
if (result < 1 || result > maxK)
{
error = "K must be an integer between 1 and " + maxK + "\n";
return(false);
}
error = "Ok";
return(true);
}
public static double precision(SampleColection sampleColection, int k, Metrics.metric choosedMetric, int p)
{
SampleColection newSampleColection = sampleColection.copy();
int probes = 0;
int correct = 0;
var samples = newSampleColection.samples;
Sample tmp;
for (int i = 0; i < samples.Count; i++)
{
probes++;
tmp = newSampleColection.samples.First();
newSampleColection.removeSample(tmp);
int?result = Algorithm.chooseDecision(tmp.attributes, newSampleColection, k, choosedMetric, p);
if (result == tmp.decision)
{
correct++;
}
newSampleColection.addSample(tmp);
}
return((double)correct / probes * 100);
}
private void loadData_Click(object sender, EventArgs e)
{
dataLoader = new DataLoader(ofd);
if (!DataValidation.isDataLoaded(dataLoader, out string dataError))
{
dataInfo.Text = dataError;
return;
}
sampleColection = new SampleColection(dataLoader.data);
var samplesAmount = sampleColection.countSamples();
var decisionAmount = sampleColection.possibleDecisions().Count;
var attributesAmount = sampleColection.samples.First().attributes.Count;
var maxK = KChecker.maxK(sampleColection);
dataInfo.Text = "File OK\n";
dataInfo.Text += "Loaded " + samplesAmount + " samples\n";
dataInfo.Text += "There are " + decisionAmount + " decisions possible\n";
dataInfo.Visible = true;
attributesInfo.Text = "Attributes";
attributesInfo.Text += "\nEnter " + attributesAmount + " attributes";
kInfo.Text = "K";
kInfo.Text += "\nK must be between 1 and " + maxK;
}
public static int?chooseDecision(List <double> attributesToCheck, SampleColection sampleColection, int k, Metrics.metric choosedMetric, int p)
{
var normalizedAttributes = Normalization.normalizeAttributes(sampleColection, attributesToCheck);
var normalizedSampleColection = Normalization.normalizeSampleColection(sampleColection);
var minDistances = new Dictionary <int, double>();
minDistances = countSumOfKminDistances(normalizedAttributes, normalizedSampleColection, k, choosedMetric, p);
double min = minDistances.First().Value;
int decision = minDistances.First().Key;
foreach (var item in minDistances)
{
if (item.Value < min)
{
min = item.Value;
decision = item.Key;
}
}
if (isOnlyOneMin(minDistances, min))
{
return(decision);
}
return(null);
}
static Dictionary <int, double> countSumOfKminDistances(List <double> sampleToCheck, SampleColection data, int k, Metrics.metric choosedMetric, int p)
{
var distances = new Dictionary <int, List <double> >();
distances = countDistances(sampleToCheck, data, choosedMetric, p);
double sumOfKminDistances = 0;
var minDistances = new Dictionary <int, double>();
foreach (var item in distances)
{
item.Value.Sort();
for (int i = 0; i < k; i++)
{
sumOfKminDistances += item.Value[i];
}
minDistances.Add(item.Key, sumOfKminDistances);
sumOfKminDistances = 0;
}
return(minDistances);
}
static Dictionary <int, List <double> > countDistances(List <double> sampleToCheck, SampleColection data, Metrics.metric choosedMetric, int p)
{
var distances = new Dictionary <int, List <double> >();
double distance;
foreach (Sample sample in data.samples)
{
distance = choosedMetric(sampleToCheck, sample.attributes, p);
if (!distances.ContainsKey(sample.decision))
{
distances.Add(sample.decision, new List <double> {
distance
});
}
else
{
distances[sample.decision].Add(distance);
}
}
return(distances);
}