/// <summary> Sets the format of the input instances.
///
/// </summary>
/// <param name="instanceInfo">an Instances object containing the input instance
/// structure (any instances contained in the object are ignored - only the
/// structure is required).
/// </param>
/// <returns> true if the outputFormat may be collected immediately
/// </returns>
/// <exception cref="Exception">if the format couldn't be set successfully
/// </exception>
public override bool setInputFormat(Instances instanceInfo)
{
base.setInputFormat(instanceInfo);
m_SelectCols.Upper = instanceInfo.numAttributes() - 1;
// Create the output buffer
FastVector attributes = new FastVector();
int outputClass = - 1;
m_SelectedAttributes = m_SelectCols.Selection;
int inStrKeepLen = 0;
int[] inStrKeep = new int[m_SelectedAttributes.Length];
for (int i = 0; i < m_SelectedAttributes.Length; i++)
{
int current = m_SelectedAttributes[i];
if (instanceInfo.classIndex() == current)
{
outputClass = attributes.size();
}
Attribute keep = (Attribute) instanceInfo.attribute(current).copy();
if (keep.type() == Attribute.STRING)
{
inStrKeep[inStrKeepLen++] = current;
}
attributes.addElement(keep);
}
m_InputStringIndex = new int[inStrKeepLen];
Array.Copy(inStrKeep, 0, m_InputStringIndex, 0, inStrKeepLen);
Instances outputFormat = new Instances(instanceInfo.relationName(), attributes, 0);
outputFormat.ClassIndex = outputClass;
setOutputFormat(outputFormat);
return true;
}
/// <summary> Calculates the cumulative margin distribution for the set of
/// predictions, returning the result as a set of Instances. The
/// structure of these Instances is as follows:<p> <ul>
/// <li> <b>Margin</b> contains the margin value (which should be plotted
/// as an x-coordinate)
/// <li> <b>Current</b> contains the count of instances with the current
/// margin (plot as y axis)
/// <li> <b>Cumulative</b> contains the count of instances with margin
/// less than or equal to the current margin (plot as y axis)
/// </ul> <p>
///
/// </summary>
/// <returns> datapoints as a set of instances, null if no predictions
/// have been made.
/// </returns>
public virtual Instances getCurve(FastVector predictions)
{
if (predictions.size() == 0)
{
return null;
}
Instances insts = makeHeader();
double[] margins = getMargins(predictions);
int[] sorted = Utils.sort(margins);
int binMargin = 0;
int totalMargin = 0;
insts.add(makeInstance(- 1, binMargin, totalMargin));
for (int i = 0; i < sorted.Length; i++)
{
double current = margins[sorted[i]];
double weight = ((NominalPrediction) predictions.elementAt(sorted[i])).weight();
totalMargin = (int) (totalMargin + weight);
binMargin = (int) (binMargin + weight);
if (true)
{
insts.add(makeInstance(current, binMargin, totalMargin));
binMargin = 0;
}
}
return insts;
}
/// <summary> Calculates the performance stats for the desired class and return
/// results as a set of Instances.
///
/// </summary>
/// <param name="classIndex">index of the class of interest.
/// </param>
/// <returns> datapoints as a set of instances.
/// </returns>
public virtual Instances getCurve(FastVector predictions, int classIndex)
{
if ((predictions.size() == 0) || (((NominalPrediction) predictions.elementAt(0)).distribution().Length <= classIndex))
{
return null;
}
ThresholdCurve tc = new ThresholdCurve();
Instances threshInst = tc.getCurve(predictions, classIndex);
Instances insts = makeHeader();
int fpind = threshInst.attribute(ThresholdCurve.FP_RATE_NAME).index();
int tpind = threshInst.attribute(ThresholdCurve.TP_RATE_NAME).index();
int threshind = threshInst.attribute(ThresholdCurve.THRESHOLD_NAME).index();
double[] vals;
double fpval, tpval, thresh;
for (int i = 0; i < threshInst.numInstances(); i++)
{
fpval = threshInst.instance(i).value_Renamed(fpind);
tpval = threshInst.instance(i).value_Renamed(tpind);
thresh = threshInst.instance(i).value_Renamed(threshind);
vals = new double[3];
vals[0] = 0; vals[1] = fpval; vals[2] = thresh;
insts.add(new Instance(1.0, vals));
vals = new double[3];
vals[0] = 1; vals[1] = 1.0 - tpval; vals[2] = thresh;
insts.add(new Instance(1.0, vals));
}
return insts;
}
public void WriteFile(List <List <string> > numericDataset, string file, List <string> atrNames, List <string> targetValues, bool isTargetNumeric)
{
weka.core.FastVector targetVals = new weka.core.FastVector();
weka.core.Instances dataRel;
for (int i = 0; i < targetValues.Count; i++)
{
targetVals.addElement(targetValues[i]);
}
weka.core.Instances data;
weka.core.FastVector atts = new weka.core.FastVector();
// fill and prepare the dataset for the arrf file
for (int j = 0; j < insts.numAttributes(); j++)
{
if (j == insts.numAttributes() - 1 && isTargetNumeric == false) // target value can be nominal
{
atts.addElement(new weka.core.Attribute(atrNames[j], targetVals));
}
else
{
atts.addElement(new weka.core.Attribute(atrNames[j]));
}
}
data = new weka.core.Instances("MyRelation", atts, 0);
for (int i = 0; i < insts.numInstances(); i++)
{
double[] vals = new double[insts.numAttributes()];
for (int j = 0; j < insts.numAttributes(); j++)
{
if (j == insts.numAttributes() - 1 && isTargetNumeric == false) // target value can be nominal
{
vals[j] = targetVals.indexOf(numericDataset[j][i]);
}
else
{
vals[j] = Convert.ToDouble(numericDataset[j][i]);
}
}
data.add(new weka.core.DenseInstance(1.0, vals));
}
if (File.Exists(file))
{
File.Delete(file);
}
var saver = new weka.core.converters.ArffSaver();
saver.setInstances(data);
saver.setFile(new java.io.File(file));
// files are saved into {AppFolder}/bin/Debug folder. You can find two files in this path.
saver.writeBatch();
}
/// <summary> Calculates the performance stats for the default class and return
/// results as a set of Instances. The
/// structure of these Instances is as follows:<p> <ul>
/// <li> <b>Probability Cost Function </b>
/// <li> <b>Normalized Expected Cost</b>
/// <li> <b>Threshold</b> contains the probability threshold that gives
/// rise to the previous performance values.
/// </ul> <p>
///
/// </summary>
/// <seealso cref="TwoClassStats">
/// </seealso>
/// <param name="classIndex">index of the class of interest.
/// </param>
/// <returns> datapoints as a set of instances, null if no predictions
/// have been made.
/// </returns>
public virtual Instances getCurve(FastVector predictions)
{
if (predictions.size() == 0)
{
return null;
}
return getCurve(predictions, ((NominalPrediction) predictions.elementAt(0)).distribution().Length - 1);
}
/// <summary> Pulls all the margin values out of a vector of NominalPredictions.
///
/// </summary>
/// <param name="predictions">a FastVector containing NominalPredictions
/// </param>
/// <returns> an array of margin values.
/// </returns>
private double[] getMargins(FastVector predictions)
{
// sort by predicted probability of the desired class.
double[] margins = new double[predictions.size()];
for (int i = 0; i < margins.Length; i++)
{
NominalPrediction pred = (NominalPrediction) predictions.elementAt(i);
margins[i] = pred.margin();
}
return margins;
}
public void TestCreationOfEnums()
{
// Arrange
var values = new weka.core.FastVector();
values.addElement("beech");
values.addElement("oak");
values.addElement("ash");
var attribute = new weka.core.Attribute("trees", values);
var repo = new EnumRepository();
// Act
var enumValue = repo.GetEnumValue(attribute, 0);
// Assert
var fields = enumValue.GetType().GetFields();
Assert.AreEqual(3, fields.Length);
Assert.AreEqual("beech", fields[0].Name);
}
public int InitializeClassifier(string[] atributes, string[] gestures, string classAttribute, string modelLocation)
{
java.io.ObjectInputStream ois = new java.io.ObjectInputStream(new java.io.FileInputStream(modelLocation));
m_cl = (weka.classifiers.Classifier)ois.readObject();
//Declare the feature vector
weka.core.FastVector fvWekaFeatureVector = new weka.core.FastVector(atributes.Length + 1);
for (int i = 0; i < atributes.Length; i++)
{
weka.core.Attribute aux = new weka.core.Attribute(atributes[i]);
fvWekaFeatureVector.addElement(aux);
}
//Declare the class weka.core.Attribute along with its values
weka.core.FastVector fvClassValues = new weka.core.FastVector(gestures.Length);
for (int i = 0; i < gestures.Length; i++)
{
weka.core.Attribute z1 = new weka.core.Attribute(atributes[i]);
fvClassValues.addElement(gestures[i]);
}
//fvClassValues.addElement("yes");
//fvClassValues.addElement("no");
weka.core.Attribute ClassAttribute = new weka.core.Attribute(classAttribute, fvClassValues);
fvWekaFeatureVector.addElement(ClassAttribute);
dataSet = new weka.core.Instances("TestRel", fvWekaFeatureVector, 10);
dataSet.setClassIndex(atributes.Length);
testInstance = new weka.core.Instance(atributes.Length + 1);
return(1);
}
/// <summary> Sets the format of the input instances.
///
/// </summary>
/// <param name="instanceInfo">an Instances object containing the input instance
/// structure (any instances contained in the object are ignored - only the
/// structure is required).
/// </param>
/// <exception cref="UnsupportedAttributeTypeException">if the specified attribute
/// is neither numeric or nominal.
/// </exception>
public override bool setInputFormat(Instances instanceInfo)
{
base.setInputFormat(instanceInfo);
m_AttIndex.Upper=instanceInfo.numAttributes() - 1;
if (!Numeric && !Nominal)
{
throw new Exception("Can only handle numeric " + "or nominal attributes.");
}
m_Values.Upper=instanceInfo.attribute(m_AttIndex.Index).numValues() - 1;
if (Nominal && m_ModifyHeader)
{
instanceInfo = new Instances(instanceInfo, 0); // copy before modifying
Attribute oldAtt = instanceInfo.attribute(m_AttIndex.Index);
int[] selection = m_Values.Selection;
FastVector newVals = new FastVector();
for (int i = 0; i < selection.Length; i++)
{
newVals.addElement(oldAtt.value_Renamed(selection[i]));
}
instanceInfo.deleteAttributeAt(m_AttIndex.Index);
instanceInfo.insertAttributeAt(new Attribute(oldAtt.name(), newVals), m_AttIndex.Index);
m_NominalMapping = new int[oldAtt.numValues()];
for (int i = 0; i < m_NominalMapping.Length; i++)
{
bool found = false;
for (int j = 0; j < selection.Length; j++)
{
if (selection[j] == i)
{
m_NominalMapping[i] = j;
found = true;
break;
}
}
if (!found)
{
m_NominalMapping[i] = - 1;
}
}
}
setOutputFormat(instanceInfo);
return true;
}
private weka.core.FastVector generateStateAttributes(int rIdx)
{
var atts = new weka.core.FastVector();
// Get all the features of this class.
foreach (var method in typeof(LimitFeatureGenerator).GetMethods())
{
var attributes = method.GetCustomAttributes(typeof(Feature), true);
if (attributes.Length == 0)
continue;
// Get the feature attribute on this method.
var attr = ((Feature)attributes[0]);
if(rIdx < (int)attr.MinRound || rIdx > (int)attr.MaxRound)
continue;
// Get the name for this column in the CSV file.
string name = attr.Name;
switch (attr.FType) {
case FeatureType.Boolean:
{
var attVals = new weka.core.FastVector();
attVals.addElement(Boolean.FalseString);
attVals.addElement(Boolean.TrueString);
atts.addElement(new weka.core.Attribute(name, attVals));
}break;
case FeatureType.Enum:
{
var attVals = new weka.core.FastVector();
var vals = Enum.GetNames(attr.EnumType);
for(int i = 0; i < vals.Length; i++)
attVals.addElement(vals[i]);
atts.addElement(new weka.core.Attribute(name, attVals));
}break;
case FeatureType.Nominal:
{
var attVals = new weka.core.FastVector();
var vals = attr.NominalValues;
for(int i = 0; i < vals.Length; i++)
attVals.addElement(vals[i]);
atts.addElement(new weka.core.Attribute(name, attVals));
}break;
case FeatureType.String:
{
atts.addElement(new weka.core.Attribute(name, (weka.core.FastVector)null));
}break;
case FeatureType.Discrete:
case FeatureType.Continuous:
{
atts.addElement(new weka.core.Attribute(name));
}break;
default: throw new Exception("Unknown attribute type: " + attr.FType.ToString());
}
}
return atts;
}
public weka.core.Instances GenerateClassifierInstances(int rIdx)
{
var atts = generateStateAttributes(rIdx);
var classVals = new weka.core.FastVector();
classVals.addElement("Fold");
classVals.addElement("Call");
classVals.addElement("Raise");
atts.addElement(new weka.core.Attribute("Action", classVals));
var data = new weka.core.Instances(((Rounds)rIdx).ToString().ToLower() + "_data", atts, 0);
data.setClassIndex(data.numAttributes() - 1);
return data;
}
private double[] getProbabilities(FastVector predictions, int classIndex)
{
// sort by predicted probability of the desired class.
double[] probs = new double[predictions.size()];
for (int i = 0; i < probs.Length; i++)
{
NominalPrediction pred = (NominalPrediction) predictions.elementAt(i);
probs[i] = pred.distribution()[classIndex];
}
return probs;
}
/// <summary> Creates an Instances object with the attributes we will be calculating.
///
/// </summary>
/// <returns> the Instances structure.
/// </returns>
private Instances makeHeader()
{
FastVector fv = new FastVector();
fv.addElement(new Attribute("Margin"));
fv.addElement(new Attribute("Current"));
fv.addElement(new Attribute("Cumulative"));
return new Instances("MarginCurve", fv, 100);
}
/// <summary> Calculates the performance stats for the desired class and return
/// results as a set of Instances.
///
/// </summary>
/// <param name="classIndex">index of the class of interest.
/// </param>
/// <returns> datapoints as a set of instances.
/// </returns>
public virtual Instances getCurve(FastVector predictions, int classIndex)
{
if ((predictions.size() == 0) || (((NominalPrediction) predictions.elementAt(0)).distribution().Length <= classIndex))
{
return null;
}
double totPos = 0, totNeg = 0;
double[] probs = getProbabilities(predictions, classIndex);
// Get distribution of positive/negatives
for (int i = 0; i < probs.Length; i++)
{
NominalPrediction pred = (NominalPrediction) predictions.elementAt(i);
if (pred.actual() == weka.classifiers.evaluation.Prediction_Fields.MISSING_VALUE)
{
System.Console.Error.WriteLine(GetType().FullName + " Skipping prediction with missing class value");
continue;
}
if (pred.weight() < 0)
{
System.Console.Error.WriteLine(GetType().FullName + " Skipping prediction with negative weight");
continue;
}
if (pred.actual() == classIndex)
{
totPos += pred.weight();
}
else
{
totNeg += pred.weight();
}
}
Instances insts = makeHeader();
int[] sorted = Utils.sort(probs);
TwoClassStats tc = new TwoClassStats(totPos, totNeg, 0, 0);
double threshold = 0;
double cumulativePos = 0;
double cumulativeNeg = 0;
for (int i = 0; i < sorted.Length; i++)
{
if ((i == 0) || (probs[sorted[i]] > threshold))
{
tc.TruePositive = tc.TruePositive - cumulativePos;
tc.FalseNegative = tc.FalseNegative + cumulativePos;
tc.FalsePositive = tc.FalsePositive - cumulativeNeg;
tc.TrueNegative = tc.TrueNegative + cumulativeNeg;
threshold = probs[sorted[i]];
insts.add(makeInstance(tc, threshold));
cumulativePos = 0;
cumulativeNeg = 0;
if (i == sorted.Length - 1)
{
break;
}
}
NominalPrediction pred = (NominalPrediction) predictions.elementAt(sorted[i]);
if (pred.actual() == weka.classifiers.evaluation.Prediction_Fields.MISSING_VALUE)
{
System.Console.Error.WriteLine(GetType().FullName + " Skipping prediction with missing class value");
continue;
}
if (pred.weight() < 0)
{
System.Console.Error.WriteLine(GetType().FullName + " Skipping prediction with negative weight");
continue;
}
if (pred.actual() == classIndex)
{
cumulativePos += pred.weight();
}
else
{
cumulativeNeg += pred.weight();
}
/*
System.out.println(tc + " " + probs[sorted[i]]
+ " " + (pred.actual() == classIndex));
*/
/*if ((i != (sorted.length - 1)) &&
((i == 0) ||
(probs[sorted[i]] != probs[sorted[i - 1]]))) {
insts.add(makeInstance(tc, probs[sorted[i]]));
}*/
}
return insts;
}
private Instances makeHeader()
{
FastVector fv = new FastVector();
fv.addElement(new Attribute(TRUE_POS_NAME));
fv.addElement(new Attribute(FALSE_NEG_NAME));
fv.addElement(new Attribute(FALSE_POS_NAME));
fv.addElement(new Attribute(TRUE_NEG_NAME));
fv.addElement(new Attribute(FP_RATE_NAME));
fv.addElement(new Attribute(TP_RATE_NAME));
fv.addElement(new Attribute(PRECISION_NAME));
fv.addElement(new Attribute(RECALL_NAME));
fv.addElement(new Attribute(FALLOUT_NAME));
fv.addElement(new Attribute(FMEASURE_NAME));
fv.addElement(new Attribute(THRESHOLD_NAME));
return new Instances(RELATION_NAME, fv, 100);
}
/// <summary> Includes a whole bunch of predictions in the confusion matrix.
///
/// </summary>
/// <param name="predictions">a FastVector containing the NominalPredictions
/// to include
/// </param>
/// <exception cref="Exception">if no valid prediction was made (i.e.
/// unclassified).
/// </exception>
public virtual void addPredictions(FastVector predictions)
{
for (int i = 0; i < predictions.size(); i++)
{
addPrediction((NominalPrediction) predictions.elementAt(i));
}
}
private Instances makeHeader()
{
FastVector fv = new FastVector();
fv.addElement(new Attribute(PROB_COST_FUNC_NAME));
fv.addElement(new Attribute(NORM_EXPECTED_COST_NAME));
fv.addElement(new Attribute(THRESHOLD_NAME));
return new Instances(RELATION_NAME, fv, 100);
}
