Example usage for weka.core Instances setRelationName

Introduction

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

Prototype

public void setRelationName(String newName) 

Source Link

Document

Sets the relation's name.

Usage

From source file:meka.filters.unsupervised.attribute.MekaClassAttributes.java

License:Open Source License

/**
 * Determines the output format based on the input format and returns 
 * this. In case the output format cannot be returned immediately, i.e.,
 * hasImmediateOutputFormat() returns false, then this method will called
 * from batchFinished() after the call of preprocess(Instances), in which,
 * e.g., statistics for the actual processing step can be gathered.
 *
 * @param inputFormat     the input format to base the output format on
 * @return                the output format
 * @throws Exception      in case the determination goes wrong
 *//*from  w  w w  .j a  va2 s .co  m*/
protected Instances determineOutputFormat(Instances inputFormat) throws Exception {
    int i;
    int[] indices;
    StringBuilder order;
    Instances output;

    m_AttributeIndices.setUpper(inputFormat.numAttributes() - 1);
    order = new StringBuilder();
    indices = m_AttributeIndices.getSelection();
    if (indices.length == 0)
        throw new WekaException("No attributes defined as class attributes!");
    for (i = 0; i < indices.length; i++) {
        if (i > 0)
            order.append(",");
        order.append("" + (indices[i] + 1));
    }
    for (i = 0; i < inputFormat.numAttributes(); i++) {
        if (m_AttributeIndices.isInRange(i))
            continue;
        order.append(",");
        order.append("" + (i + 1));
    }
    m_Reorder.setAttributeIndices(order.toString());
    m_Reorder.setInputFormat(inputFormat);

    output = m_Reorder.getOutputFormat();
    output.setClassIndex(indices.length);
    output.setRelationName("-C " + indices.length);

    return output;
}

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From source file:meka.gui.explorer.PreprocessTab.java

License:Open Source License

/**
 * Filters the data with the specified filter.
 *
 * @param filter the filter to push the data through
 * @param newName the new relation name, null if to keep current
 *///from  ww  w.  jav  a 2 s .com
protected void filterData(final Filter filter, final String newName) {
    Runnable run;

    log("Filtering data: " + OptionUtils.toCommandLine(filter));

    run = new Runnable() {
        @Override
        public void run() {
            try {
                String relName = getData().relationName();
                filter.setInputFormat(getData());
                Instances filtered = Filter.useFilter(getData(), filter);
                if (newName == null)
                    filtered.setRelationName(relName);
                else
                    filtered.setRelationName(newName);
                getOwner().notifyTabsDataChanged(PreprocessTab.this, filtered);
                setData(filtered);
                log("Data filtered successfully!");
            } catch (Exception e) {
                throw new IllegalStateException(e);
            }
        }
    };
    start(run);
}

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