Package edu.ucla.sspace.matrix

Examples of edu.ucla.sspace.matrix.MatrixFactorization.factorize()

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    @Test public void testReduction() {
        MatrixFactorization reducer =
            new NonNegativeMatrixFactorizationMultiplicative();
        SparseMatrix matrix = new YaleSparseMatrix(VALUES);

        reducer.factorize(matrix, 2);

        Matrix W = reducer.dataClasses();
        assertEquals(4, W.rows());
        assertEquals(2, W.columns());
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        MatrixFile mFile = new MatrixFile(new File(options.getPositionalArg(0)),
                                          format);

        reducer.factorize(mFile, dimensions);

        File wordSpaceFile = new File(options.getStringOption('w'));
        MatrixIO.writeMatrix(reducer.dataClasses(), wordSpaceFile,
                             Format.DENSE_TEXT);
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        Format outputFormat = (options.hasOption('w'))
            ? getFormat(options.getStringOption('w'))
            : Format.SVDLIBC_DENSE_TEXT;

        MatrixFactorization factorizer = SVD.getFastestAvailableFactorization();
        factorizer.factorize(new MatrixFile(matrixFile, inputFormat), dimensions);
        File uFile = new File(outputDir, "U.mat");
        MatrixIO.writeMatrix(factorizer.dataClasses(), uFile, outputFormat);
        File vFile = new File(outputDir, "V.mat");
        MatrixIO.writeMatrix(factorizer.classFeatures(), vFile, outputFormat);
    }
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