List of usage examples for org.apache.mahout.math SingularValueDecomposition getSingularValues
public double[] getSingularValues()
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 w w w. ja va 2s .c om 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); } }