clases.Preproceso.java Source code

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Here is the source code for clases.Preproceso.java

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/*
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package clases;

import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import weka.core.Instances;
import weka.filters.Filter;
import weka.filters.unsupervised.attribute.Remove;
import weka.filters.unsupervised.attribute.StringToNominal;
import weka.filters.unsupervised.instance.Randomize;

/**
 *
 * @author Alvaro
 */
public class Preproceso {

    public static Instances randomize(Instances data) throws Exception {
        Randomize ran = new Randomize();
        ran.setRandomSeed(42);
        ran.setInputFormat(data);
        return Filter.useFilter(data, ran);
    }

    public static Instances filterStringToNominal(Instances data, String i) {
        try {
            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;
        }
    }

    public static Instances filterRemoveAttribute(Instances data, List<String> indices) {
        String ind = "";
        boolean a = false;
        for (String atrib : indices) {
            for (int i = 0; i < data.numAttributes(); i++) {
                if (data.attribute(i).name().equals(atrib)) {
                    /*            if(!a)
                    ind=""+i;
                                else*/
                    ind = ind + "," + i;
                    break;
                }
            }
        }
        Remove rm = new Remove();
        rm.setAttributeIndices(ind.substring(1, ind.length()));

        try {
            rm.setInputFormat(data);
            return Filter.useFilter(data, rm);
        } catch (Exception ex) {
            Logger.getLogger(Preproceso.class.getName()).log(Level.SEVERE, null, ex);
            return null;
        }
    }

}