Example usage for weka.core Instance setValue

Introduction

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

Prototype

public void setValue(Attribute att, String value);

Source Link

Document

Sets a value of an nominal or string attribute to the given value.

Usage

From source file:wekimini.DataManager.java

public void setOutputValue(int index, int whichOutput, double val) {
    Instance i = allInstances.instance(index);
    if (i == null) {
        return;//from  w w w . j ava2 s  .c om
    }

    boolean changesNumberOfInstances = i.isMissing(numMetaData + numInputs + whichOutput);

    if (isDiscrete[whichOutput]) {
        int v = (int) val;
        Attribute a = i.attribute(numMetaData + numInputs + whichOutput);
        if (a.isNominal() && v >= 0 && v <= numClasses[whichOutput]) {
            i.setValue(numMetaData + numInputs + whichOutput, v);
        } else {
            logger.log(Level.SEVERE, "Attribute value out of range");
            //TODO: CHeck this
        }
    } else {
        //TODO insert error checking / range limiting for this version!
        i.setValue(numMetaData + numInputs + whichOutput, val);
    }
    if (changesNumberOfInstances) {
        setNumExamplesPerOutput(whichOutput, getNumExamplesPerOutput(whichOutput) + 1);
    }
}

From source file:wekimini.DataManager.java

public void setInputValue(int index, int whichInput, double val) {
    /*  if (whichInput < 0 || whichInput >= numInputs) {
     throw new IllegalArgumentException("Invalid input number in setInputValue");
     } *//* w  w w  .  ja va2 s .  c om*/
    Instance i = allInstances.instance(index);
    if (i != null) {
        i.setValue(numMetaData + whichInput, val);
    } //else TODO ?
}

From source file:wekimini.InputGenerator.java

public void selectNewInputs(int numNewInstances) {
    setStoredStats();/*from w w w  .jav  a  2s .co  m*/

    for (int j = 0; j < numNewInstances; j++) {
        Instance tempInstance = storedInputs.firstInstance();

        for (int i = 0; i < numInputs; i++) {
            int index = i + numMetaData;
            double value = storedMin[i] + ((storedMax[i] - storedMin[i]) / (numNewInstances - 1)) * j;
            tempInstance.setValue(index, value);
        }
        trainingInputs.add(tempInstance);
    }
}

From source file:Windows.windowGenerating.java

/**
 * Metoda zamienia liste zbiorw na instance. Pierwsza ptla tworzy list
 * wartoci jakie mog przybiera atrybut./*  ww w .j av  a 2  s . c o m*/
 *
 * @param atr lista atryburw
 * @param s lista zawierajaca kombinajcie uzupenionych danych
 * @return
 *
 */
public static Instances setToInstances(List<Set<String>> atr, Set<List<String>> s) {

    ArrayList<Attribute> lAtrib = new ArrayList<>();

    for (int i = 0; i < atr.size(); i++) {
        FastVector labels = new FastVector(); //Utworzenie obiektu kolekcji wartosci nowego atrybutu symbolicznego
        Set<String> setValuesAtr = atr.get(i);
        Iterator ite = setValuesAtr.iterator();
        while (ite.hasNext()) {
            Object e = ite.next();
            labels.addElement(e);
        }
        Attribute attrib = new Attribute(listOfHeather.get(i), labels);
        lAtrib.add(attrib);
    }

    Instances dataNewObj = new Instances("Nowa tablica", lAtrib, 0);

    for (int i = 0; i < numOfNewInstance; i++) {
        Instance n = new DenseInstance(lAtrib.size());
        dataNewObj.add(n);
    }
    System.out.println(dataNewObj.numInstances() + " jest instancji nowo wygenerowanych");
    int iteratorek = 0;
    Iterator iter = s.iterator();
    while (iter.hasNext()) {
        Instance instance = dataNewObj.instance(iteratorek); //Pobranie obiektu o podanym numerze
        List<String> str = (List<String>) iter.next();
        for (int j = 0; j < dataNewObj.numAttributes(); j++) {
            instance.setValue(j, str.get(j));
        }
        iteratorek++;
    }
    return dataNewObj;
}