Example usage for org.apache.mahout.math Matrix assignColumn

Introduction

In this page you can find the example usage for org.apache.mahout.math Matrix assignColumn.

Prototype

Matrix assignColumn(int column, Vector other);

Source Link

Document

Assign the other vector values to the column of the receiver

Usage

From source file:ca.uwaterloo.cpami.mahout.matrix.utils.GramSchmidt.java

License:Apache License

public static void storeSparseColumns(Matrix mat) {
    int numCols = mat.numCols();
    int numRows = mat.numRows();
    for (int i = 0; i < numCols; i++) {
        Vector sparseVect = new RandomAccessSparseVector(numRows);
        Vector col = mat.viewColumn(i);
        Iterator<Vector.Element> itr = col.iterateNonZero();
        while (itr.hasNext()) {
            Element elem = itr.next();
            if (elem.get() != 0) {
                System.out.println(elem.get());
                sparseVect.set(elem.index(), elem.get());
            }/*from  w  w w .ja v a 2  s  . c  o  m*/
        }
        System.out.println(sparseVect.getNumNondefaultElements());

        mat.assignColumn(i, sparseVect);
        System.out.println(mat.viewColumn(i).getNumNondefaultElements());
        System.exit(1);

    }
}

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