Jama getS gives exception

Asked Apr 04 '12 at 08:58

Active Apr 04 '12 at 08:58

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I am applying SVD to a term - document matrix that i have already created.The matrix is a double array of the form :

public static double[][] tdidf;
tdidf = new double[listOfFiles.length][keywordList.size()];

But when i apple svd :

public void computeSVD()
{
Matrix A = new Matrix(tdidf); SingularValueDecomposition svd = A.svd();
Matrix U = svd.getU();
Matrix S = svd.getS();
}

i am getting an error :

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 53
at Jama.SingularValueDecomposition.getS(SingularValueDecomposition.java:511)
at TDIDF_Matrix.computeSVD(TDIDF_Matrix.java:119)
at Jama.main(Jama.java:191)

Do i need to transpose A before computing SVD?

asked Apr 04 '12 at 08:58

Deepankar Bajpeyi

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Have you considered using Ojalgo? I find it slightly better – mbatchkarov Apr 04 '12 at 10:36
@reseter I solved the problem using Apache commons math library. Its created on Jama itself. But i would still like to know the source of the error – Deepankar Bajpeyi Apr 04 '12 at 10:45

Jama getS gives exception

0 Answers0