Example usage for org.apache.mahout.math SparseMatrix set

Introduction

In this page you can find the example usage for org.apache.mahout.math SparseMatrix set.

Prototype

@Override
    public void set(String rowLabel, double[] rowData) 

Source Link

Usage

From source file:com.twitter.algebra.AlgebraCommon.java

License:Apache License

/**
 * Convert a 2-dimensional array to a sparse matrix in {@link MapDir} format
 * @param vectors a 2-dimensional array of doubles
 * @param outPath the path to which the dense matrix will be written
 * @param tmpPath an argument required to be passed to {@link DistributedRowMatrix}
 * @param label a unique label to name the output matrix directory
 * @return a {@link DistributedRowMatrix} pointing to the in-filesystem matrix
 * @throws Exception/*from w  w w . j ava  2  s.  c  om*/
 */
public static DistributedRowMatrix toSparseMapDir(double[][] vectors, Path outPath, Path tmpPath, String label)
        throws Exception {
    int nRows = vectors.length;
    int nCols = vectors[0].length;
    SparseMatrix m = new SparseMatrix(nRows, nCols);
    for (int r = 0; r < nRows; r++)
        m.set(r, vectors[r]);
    return AlgebraCommon.toMapDir(m, outPath, tmpPath, label);
}

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