Example usage for weka.core AttributeLocator AttributeLocator

Introduction

In this page you can find the example usage for weka.core AttributeLocator AttributeLocator.

Prototype

public AttributeLocator(Instances data, int type, int[] indices) 

Source Link

Document

initializes the AttributeLocator with the given data for the specified type of attribute.

Usage

From source file:en_deep.mlprocess.manipulation.featmodif.FeatureModifierFilter.java

License:Open Source License

/**
 * Set the output format if the class is nominal.
 *//*from ww w  .  jav a  2 s . c o m*/
private void setOutputFormat() {

    FastVector newAtts;
    int newClassIndex;
    Instances outputFormat;

    newClassIndex = getInputFormat().classIndex();
    newAtts = new FastVector();

    BitSet attrSrc = new BitSet(), attrDest = new BitSet();

    int attSoFar = 0;

    for (int j = 0; j < getInputFormat().numAttributes(); j++) {

        Attribute att = getInputFormat().attribute(j);

        if (!m_Columns.isInRange(j)) {
            newAtts.addElement(att.copy());

            attrSrc.set(j);
            attrDest.set(attSoFar++);

        } else {

            ArrayList<Attribute> valueAttrs = getAttributeOutputFormat(att);

            if (newClassIndex >= 0 && j < getInputFormat().classIndex()) {
                newClassIndex += valueAttrs.size() - 1;
            }
            newAtts.addAll(valueAttrs);

            if (m_PreserveOriginals) {
                attrSrc.set(j);
                attrDest.set(attSoFar);
            }
            attSoFar += valueAttrs.size();
        }
    }

    outputFormat = new Instances(getInputFormat().relationName(), newAtts, 0);
    outputFormat.setClassIndex(newClassIndex);
    setOutputFormat(outputFormat);

    m_StringToCopySrc = new AttributeLocator(getInputFormat(), Attribute.STRING, MathUtils.findTrue(attrSrc));
    m_StringToCopyDst = new AttributeLocator(outputFormat, Attribute.STRING, MathUtils.findTrue(attrDest));
}

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From source file:en_deep.mlprocess.manipulation.featmodif.ReplaceMissing.java

License:Open Source License

/**
 * Set the output format if the class is nominal.
 *///from www.  j  a  v a2 s . co  m
private void setOutputFormat() {

    FastVector newAtts;
    Instances outputFormat;

    newAtts = new FastVector();

    BitSet attrSrc = new BitSet();

    for (int j = 0; j < getInputFormat().numAttributes(); j++) {

        Attribute att = null;
        Attribute srcAtt = getInputFormat().attribute(j);

        if (!m_Columns.isInRange(j) || srcAtt.indexOfValue(m_ReplVal) >= 0) {
            att = (Attribute) srcAtt.copy();
        } else if (srcAtt.isNominal()) {

            Enumeration<String> valsEnum = srcAtt.enumerateValues();
            ArrayList<String> valsList = new ArrayList<String>();

            while (valsEnum.hasMoreElements()) {
                valsList.add(valsEnum.nextElement());
            }
            valsList.add(m_ReplVal);

            att = new Attribute(srcAtt.name(), valsList);
        } else { // string attributes
            att = (Attribute) srcAtt.copy();
            att.addStringValue(m_ReplVal);
        }

        newAtts.addElement(att);
        attrSrc.set(j);
    }

    outputFormat = new Instances(getInputFormat().relationName(), newAtts, 0);
    outputFormat.setClassIndex(getInputFormat().classIndex());

    setOutputFormat(outputFormat);

    m_StringToCopy = new AttributeLocator(getInputFormat(), Attribute.STRING, MathUtils.findTrue(attrSrc));
}

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