Example usage for weka.core UnassignedClassException UnassignedClassException

Introduction

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

Prototype

public UnassignedClassException(String message) 

Source Link

Document

Creates a new UnassignedClassException.

Usage

From source file:adams.opt.cso.Measure.java

License:Open Source License

/**
 * Checks whether the data can be used with this measure.
 *
 * @param data   the data to check//from  w w  w.j a v a 2 s .co m
 * @return      true if the measure can be obtain for this kind of data
 */
public boolean isValid(Instances data) {
    if (data.classIndex() == -1)
        throw new UnassignedClassException("No class attribute set!");

    if (data.classAttribute().isNominal())
        return m_Nominal;
    else if (data.classAttribute().isNumeric())
        return m_Numeric;
    else
        throw new IllegalStateException("Class attribute '" + data.classAttribute().type() + "' not handled!");
}

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From source file:com.jgaap.util.Instance.java

License:Open Source License

/**
 * Tests if an instance's class is missing.
 *
 * @return true if the instance's class is missing
 * @throws UnassignedClassException if the class is not set or the instance doesn't
 * have access to a dataset// w  w w.  jav  a 2s  .  c  o m
 */
//@ requires classIndex() >= 0;
public /*@pure@*/ boolean classIsMissing() {

    if (classIndex() < 0) {
        throw new UnassignedClassException("Class is not set!");
    }
    return isMissing(classIndex());
}

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From source file:com.jgaap.util.Instance.java

License:Open Source License

/**
 * Returns an instance's class value in internal format. (ie. as a
 * floating-point number)/*from   www  .  j  a  v  a 2s.  c o  m*/
 *
 * @return the corresponding value as a double (If the 
 * corresponding attribute is nominal (or a string) then it returns the 
 * value's index as a double).
 * @throws UnassignedClassException if the class is not set or the instance doesn't
 * have access to a dataset 
 */
//@ requires classIndex() >= 0;
public /*@pure@*/ double classValue() {

    if (classIndex() < 0) {
        throw new UnassignedClassException("Class is not set!");
    }
    return value(classIndex());
}

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From source file:com.jgaap.util.Instance.java

License:Open Source License

/**
 * Sets the class value of an instance to be "missing". A deep copy of
 * the vector of attribute values is performed before the
 * value is set to be missing.//from w  ww.ja v a  2 s .c om
 *
 * @throws UnassignedClassException if the class is not set
 * @throws UnassignedDatasetException if the instance doesn't
 * have access to a dataset
 */
//@ requires classIndex() >= 0;
public void setClassMissing() {

    if (classIndex() < 0) {
        throw new UnassignedClassException("Class is not set!");
    }
    setMissing(classIndex());
}

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From source file:com.jgaap.util.Instance.java

License:Open Source License

/**
 * Sets the class value of an instance to the given value (internal
 * floating-point format).  A deep copy of the vector of attribute
 * values is performed before the value is set.
 *
 * @param value the new attribute value (If the corresponding
 * attribute is nominal (or a string) then this is the new value's
 * index as a double).  //from www  . j a va 2  s.  co  m
 * @throws UnassignedClassException if the class is not set
 * @throws UnaddignedDatasetException if the instance doesn't
 * have access to a dataset 
 */
//@ requires classIndex() >= 0;
public void setClassValue(double value) {

    if (classIndex() < 0) {
        throw new UnassignedClassException("Class is not set!");
    }
    setValue(classIndex(), value);
}

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From source file:de.uni_potsdam.hpi.bpt.promnicat.analysisModules.clustering.ProcessInstances.java

License:Open Source License

/**
 * Stratifies a set of instances according to its class values if the class
 * attribute is nominal (so that afterwards a stratified cross-validation
 * can be performed)./* ww w  .ja  va 2s  .  c om*/
 * 
 * @param numFolds
 *            the number of folds in the cross-validation
 * @throws UnassignedClassException
 *             if the class is not set
 */
public void stratify(int numFolds) {

    if (numFolds <= 1) {
        throw new IllegalArgumentException("Number of folds must be greater than 1");
    }
    if (m_ClassIndex < 0) {
        throw new UnassignedClassException("Class index is negative (not set)!");
    }
    if (classAttribute().isNominal()) {

        // sort by class
        int index = 1;
        while (index < numInstances()) {
            ProcessInstance instance1 = getInstance(index - 1);
            for (int j = index; j < numInstances(); j++) {
                ProcessInstance instance2 = getInstance(j);
                if ((instance1.classValue() == instance2.classValue())
                        || (instance1.classIsMissing() && instance2.classIsMissing())) {
                    swap(index, j);
                    index++;
                }
            }
            index++;
        }
        stratStep(numFolds);
    }
}

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From source file:milk.core.Exemplar.java

License:Open Source License

/**
 * Returns the class attribute./*from  w w  w . j  av  a2  s.  c  o  m*/
 *
 * @return the class attribute
 * @exception UnassignedClassException if the class is not set
 */
public final Attribute classAttribute() {

    if (m_ClassIndex < 0) {
        throw new UnassignedClassException("Class index is negative (not set)!");
    }
    return m_Instances.attribute(m_ClassIndex);
}

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From source file:milk.core.Exemplar.java

License:Open Source License

/**
 * Returns the class value of this exemplar.
 *
 * @return the class value/*from ww w  .  j av  a  2 s.co m*/
 * @exception UnassignedClassException if the class is not set
 */
public final double classValue() {
    if (m_ClassIndex < 0) {
        throw new UnassignedClassException("Class index is negative (not set)!");
    }
    return m_ClassValue;
}

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From source file:milk.core.Exemplars.java

License:Open Source License

/**
 * Returns the class attribute.//from  ww  w . j  a v  a2  s.  co  m
 *
 * @return the class attribute
 * @exception UnassignedClassException if the class is not set
 */
public final Attribute classAttribute() {

    if (m_ClassIndex < 0) {
        throw new UnassignedClassException("Class index is negative (not set)!");
    }
    return attribute(m_ClassIndex);
}

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From source file:milk.core.Exemplars.java

License:Open Source License

/**
 * Returns the number of class labels.//www .j  a  v a2s.  c  om
 *
 * @return the number of class labels as an integer if the class 
 * attribute is nominal, 1 otherwise.
 * @exception UnassignedClassException if the class is not set
 */
public final int numClasses() {

    if (m_ClassIndex < 0) {
        throw new UnassignedClassException("Class index is negative (not set)!");
    }
    if (!classAttribute().isNominal()) {
        return 1;
    } else {
        return classAttribute().numValues();
    }
}

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