Example usage for org.apache.mahout.math SingularValueDecomposition getV

Introduction

In this page you can find the example usage for org.apache.mahout.math SingularValueDecomposition getV.

Prototype

public Matrix getV() 

Source Link

Document

Returns the right singular vectors V.

Usage

From source file:org.carrot2.matrix.factorization.PartialSingularValueDecomposition.java

License:Open Source License

public void compute() {
    // Use Colt's SVD
    SingularValueDecomposition svd;
    if (A.columns() > A.rows()) {
        svd = new SingularValueDecomposition(new DenseMatrix(A.viewDice().toArray()));
        V = toColtMatrix(svd.getU());//from  www  .  ja va 2 s  .c  o  m
        U = toColtMatrix(svd.getV());
    } else {
        svd = new SingularValueDecomposition(new DenseMatrix(A.toArray()));
        U = toColtMatrix(svd.getU());
        V = toColtMatrix(svd.getV());
    }

    S = svd.getSingularValues();

    if (k > 0 && k < S.length) {
        U = U.viewPart(0, 0, U.rows(), k);
        V = V.viewPart(0, 0, V.rows(), k);
        S = Arrays.copyOf(S, k);
    }
}

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