Example usage for weka.distributed CSVToARFFHeaderMapTask makeInstanceFromObjectRow

Introduction

In this page you can find the example usage for weka.distributed CSVToARFFHeaderMapTask makeInstanceFromObjectRow.

Prototype

public Instance makeInstanceFromObjectRow(Instances trainingHeader, boolean setStringValues, Object[] row,
        boolean sparse) throws Exception 

Source Link

Document

Utility method for Constructing an instance given an array of Objects

Usage

From source file:distributed.core.DistributedJob.java

License:Open Source License

/**
 * Utility method to convert a row of values into an Instance
 *
 * @param row the row of data to convert to an Instance
 * @param rowHelper the configured CSVToARFFHeaderMap task to use for getting
 *          default nominal values from//from w  w w. j  a v  a 2 s . c  o m
 * @param headerNoSummary the header of the data (sans summary attributes)
 *          that contains attribute information for the instance
 * @param setStringVals true if the values of string attributes are to be set
 *          on the header (rather than accumulate in the header).
 * @param sparse true if a sparse instance should be created instead of a
 *          dense one
 * @return an Instance
 * @throws IOException if a problem occurs
 */
public static Instance objectRowToInstance(Object[] row, CSVToARFFHeaderMapTask rowHelper,
        Instances headerNoSummary, boolean setStringVals, boolean sparse) throws IOException {

    if (row.length != headerNoSummary.numAttributes()) {
        throw new IOException("The supplied Object[] row contains a different "
                + "number of values than there are attributes in the supplied " + "ARFF header");
    }

    try {
        return rowHelper.makeInstanceFromObjectRow(headerNoSummary, setStringVals, row, sparse);
    } catch (Exception ex) {
        throw new IOException(ex);
    }
}

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