Example usage for edu.stanford.nlp.stats Counters multiplyInPlace

Introduction

In this page you can find the example usage for edu.stanford.nlp.stats Counters multiplyInPlace.

Prototype

public static <E> Counter<E> multiplyInPlace(Counter<E> target, Counter<E> mult) 

Source Link

Document

Multiplies each value in target by the count of the key in mult, in place.

Usage

From source file:gr.aueb.cs.nlp.wordtagger.classifier.SVMWindows64Factory.java

License:Open Source License

/**
 * Takes all the support vectors, and their corresponding alphas, and computes a weight
 * vector that can be used in a vanilla LinearClassifier.  This only works because
 * we are using a linear kernel.  The Counter is over the feature indices (+1 cos for
 * some reason svm_light is 1-indexed), not features.
 */// www.  j  av  a  2 s  .  c  o m
private static ClassicCounter<Integer> getWeights(List<Pair<Double, ClassicCounter<Integer>>> supportVectors) {
    ClassicCounter<Integer> weights = new ClassicCounter<Integer>();
    for (Pair<Double, ClassicCounter<Integer>> sv : supportVectors) {
        ClassicCounter<Integer> c = new ClassicCounter<Integer>(sv.second());
        Counters.multiplyInPlace(c, sv.first());
        Counters.addInPlace(weights, c);
    }
    return weights;
}

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