Example usage for weka.filters.unsupervised.instance RemoveWithValues setMatchMissingValues

Introduction

In this page you can find the example usage for weka.filters.unsupervised.instance RemoveWithValues setMatchMissingValues.

Prototype

public void setMatchMissingValues(boolean newMatchMissingValues) 

Source Link

Document

Sets whether missing values are counted as a match.

Usage

From source file:etc.aloe.data.ExampleSet.java

License:Open Source License

/**
 * Returns a new example set containing only those examples with labels.
 *
 * @return//  w w  w . j  a  va  2  s. c om
 */
public ExampleSet onlyLabeled() {
    RemoveWithValues filter = new RemoveWithValues();
    filter.setAttributeIndex("" + (instances.classIndex() + 1));
    filter.setMatchMissingValues(true);
    filter.setInvertSelection(true);

    try {
        filter.setInputFormat(instances);
        Instances result = Filter.useFilter(instances, filter);
        ExampleSet resultSet = new ExampleSet(result);
        return resultSet;
    } catch (Exception ex) {
        System.err.println("Unable to apply filter!");
        return null;
    }
}

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From source file:wekimini.DataManager.java

private void updateInstancesForNewLowerMaxClass(int index, int newNumClasses) {
    //Change allInstances, dummyInstances
    // dummyInstances.attribute(numMetaData + numInputs + index).

    RemoveWithValues r = new RemoveWithValues();
    String rangeList = "1-" + (newNumClasses + 1); //String indices start at 1 in weka

    Instances newAll;//from  w  w w  . ja v  a 2s. com
    try {
        r.setAttributeIndex(Integer.toString(numMetaData + numInputs + index + 1)); //Weka indexing stupidity
        r.setNominalIndices(rangeList);
        r.setInvertSelection(true); //Keep all classes from 0 to newNumClasses
        r.setMatchMissingValues(false);
        r.setModifyHeader(true);
        r.setInputFormat(allInstances);

        newAll = Filter.useFilter(allInstances, r);
    } catch (Exception ex) {
        Logger.getLogger(DataManager.class.getName()).log(Level.SEVERE, null, ex);
        return;
    }
    if (newAll.numInstances() != allInstances.numInstances()) {
        logger.log(Level.SEVERE, "Problem: deleted instances when removing class attribute");
    }
    allInstances = newAll;

    Instances newD;
    try {
        newD = Filter.useFilter(dummyInstances, r);
    } catch (Exception ex) {
        Logger.getLogger(DataManager.class.getName()).log(Level.SEVERE, null, ex);
        return;
    }

    dummyInstances = newD;
}

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