Examples of org.apache.mahout.classifier.sgd.ModelDissector.update()

Package org.apache.mahout.classifier.sgd

Class org.apache.mahout.classifier.sgd.ModelDissector

Examples of org.apache.mahout.classifier.sgd.ModelDissector.update()

org.apache.mahout.classifier.sgd.ModelDissector.update()
Probes a model to determine the effect of a particular variable. This is done with the ade of a trace dictionary which has recorded the locations in the feature vector that are modified by various variable values. We can set these locations to 1 and then look at the resulting score. This tells us the weight the model places on that variable. @param features A feature vector to use (destructively) @param traceDictionary A trace dictionary containing variables and what locations in the feature vector are affected by them @param learner The model that we are probing to find weights on features

    bias.setTraceDictionary(traceDictionary);


    for (File file : permute(files, rand).subList(0, 500)) {
      traceDictionary.clear();
      Vector v = encodeFeatureVector(file);
      md.update(v, traceDictionary, model);
    }


    List<String> ngNames = Lists.newArrayList(newsGroups.values());
    List<ModelDissector.Weight> weights = md.summary(100);
    for (ModelDissector.Weight w : weights) {

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