Example usage for weka.filters.unsupervised.attribute Discretize setOptions

Introduction

In this page you can find the example usage for weka.filters.unsupervised.attribute Discretize setOptions.

Prototype

@Override
public void setOptions(String[] options) throws Exception 

Source Link

Document

Parses a given list of options.

Usage

From source file:NaiveBayesPckge.NaiveBayesMain.java

public static Instances useFilterDiscritize(Instances dataSet) throws Exception {
    //set options
    String[] optionsFilter = new String[4];
    //choose the number of intervals, e.g 2:
    optionsFilter[0] = "-B";
    optionsFilter[1] = "6";
    //choose the range of attributes on which to apply the filter:
    optionsFilter[2] = "-R";
    optionsFilter[3] = "first-last";
    System.out.println("> Filtering dataset using Discretize\n");
    //Apply Discretization
    Discretize discretize = new Discretize();
    discretize.setOptions(optionsFilter);
    discretize.setInputFormat(dataSet);//from www. j a  v a2 s .  c om
    Instances newDataTemp = Filter.useFilter(dataSet, discretize);

    return newDataTemp;
}

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From source file:org.tigr.microarray.mev.cluster.gui.impl.bn.PrepareArrayDataModule.java

License:Open Source License

/**
 * The <code>discretize</code> method is given a WEKA Instances object corresponding to the gene expression data
 * and returns a new WEKA Instances object with the given data discretized into a given number of equal-width bins
 *
 * @param data an <code>Instances</code> which is a WEKA Instances object corresponding to the gene expression data
 * @param numBins a <code>String</code> corresponding to the number of bins in which the data is to be discretized
 * @return an <code>Instances</code> a new WEKA Instances object with the given data discretized 
 * into a given number of equal-width bins
 * @exception NullArgumentException if an error occurs if the data is null
 * @exception OutOfRangeException if an error occurs if the numBins is out of bounds (namely, negative or equal to zero)
 */// www  .  ja  v a  2 s . c  o m
public static Instances discretize(Instances data, String numBins)
        throws NullArgumentException, OutOfRangeException {
    if (data == null) {
        throw new NullArgumentException("Parameter data passed to discretize method was null!");
    }
    if (Integer.parseInt(numBins) <= 0) {
        throw new OutOfRangeException(
                "numBins is out of range (should be strictly positive!\nnumBins=" + numBins);
    }
    try {
        String[] options = new String[2];
        options[0] = "-B";
        options[1] = numBins;
        Discretize discretize = new Discretize();
        discretize.setOptions(options);
        discretize.setInputFormat(data);
        Instances newData = Filter.useFilter(data, discretize);
        return newData;
    } catch (Exception e) {
        System.out.println(e);
        e.printStackTrace();
    }
    return null;
}

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