Example usage for weka.filters.unsupervised.attribute StringToNominal setInputFormat

Introduction

In this page you can find the example usage for weka.filters.unsupervised.attribute StringToNominal setInputFormat.

Prototype

@Override
public boolean setInputFormat(Instances instanceInfo) throws Exception 

Source Link

Document

Sets the format of the input instances.

Usage

From source file:clases.Preproceso.java

public static Instances filterStringToNominal(Instances data, String i) {
    try {//from  w  w  w. j  a v  a2  s.c  om
        StringToNominal sn = new StringToNominal();
        sn.setAttributeRange(i);
        sn.setInputFormat(data);
        return Filter.useFilter(data, sn);
    } catch (Exception ex) {
        Logger.getLogger(Preproceso.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    }
}

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From source file:ffnn.FFNN.java

public static Instances preprocess(Instances i) {
    try {/*w  ww.j  a v  a 2s.  c om*/
        Reorder rfilter = new Reorder();
        int classIdx = i.classIndex() + 1;
        String order;
        if (classIdx != 1) {
            order = "1";
            for (int j = 2; j <= i.numAttributes(); j++) {
                if (j != classIdx) {
                    order = order + "," + j;
                }
            }
        } else {
            order = "2";
            for (int j = 3; j <= i.numAttributes(); j++) {
                order = order + "," + j;
            }
        }
        order = order + "," + classIdx;
        rfilter.setAttributeIndices(order);
        rfilter.setInputFormat(i);
        i = Filter.useFilter(i, rfilter);

        StringToNominal stnfilter = new StringToNominal();
        stnfilter.setAttributeRange("first-last");
        stnfilter.setInputFormat(i);
        i = Filter.useFilter(i, stnfilter);

        NominalToBinary ntbfilter = new NominalToBinary();
        ntbfilter.setInputFormat(i);
        i = Filter.useFilter(i, ntbfilter);

        Normalize nfilter = new Normalize();
        nfilter.setInputFormat(i);
        i = Filter.useFilter(i, nfilter);
    } catch (Exception e) {
        System.out.println(e.toString());
    }
    return i;
}

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From source file:newsclassifier.NewsClassifier.java

public void StrtoNom() throws Exception {
    StringToNominal filter = new StringToNominal();
    //NumericToNominal filter = new NumericToNominal();
    filter.setInputFormat(data);
    //filter.setOptions("-R 1");
    String[] opts = { "-R", "first" };
    filter.setOptions(opts);//  w  ww  . ja v  a 2s .com
    //filter.setAttributeRange("first");
    data = Filter.useFilter(data, filter);
}

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