com.expleague.ml.models.multilabel.ConflictThresholdMultiLabelModel Maven / Gradle / Ivy
package com.expleague.ml.models.multilabel;
import com.expleague.commons.math.vectors.Vec;
import com.expleague.commons.math.vectors.VecTools;
import com.expleague.commons.math.vectors.impl.vectors.ArrayVec;
import com.expleague.ml.models.multiclass.MCModel;
/**
* User: qdeee
* Date: 22.03.15
*/
public class ConflictThresholdMultiLabelModel extends MultiLabelModel.Stub {
private final MCModel intern;
private final double threshold;
private final boolean allZeroesClassEnabled;
public ConflictThresholdMultiLabelModel(final MCModel intern, final double threshold, final boolean allZeroesClassEnabled) {
this.intern = intern;
this.threshold = threshold;
this.allZeroesClassEnabled = allZeroesClassEnabled;
}
@Override
public Vec predictLabels(final Vec x) {
final Vec prediction = intern.probs(x);
final int argMax = VecTools.argmax(prediction);
VecTools.toBinary(prediction, threshold);
if (allZeroesClassEnabled) {
if (argMax == prediction.dim() - 1) {
//all zeroes class
return new ArrayVec(ydim());
} else {
return prediction.sub(0, ydim());
}
} else {
return prediction;
}
}
@Override
public int xdim() {
return intern.xdim();
}
@Override
public int ydim() {
return allZeroesClassEnabled ? intern.countClasses() - 1 : intern.countClasses();
}
}
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