Package org.apache.mahout.math

Examples of org.apache.mahout.math.DenseMatrix.numRows()

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    RandomGenerator rnd = new MersenneTwister(1234);
    //rnd.nextDouble();
   
    Matrix res = new DenseMatrix( rows, cols );
   
    for ( int r = 0; r < res.numRows(); r++ ) {
     
      for ( int c = 0; c < res.numCols(); c++ ) {
       
        res.set(r,  c, rnd.nextDouble());
        //System.out.println( "next: " + rnd.nextDouble() );
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    Matrix row_sums_matrix = MatrixUtils.rowSums(m);
   
    assertEquals(1, row_sums_matrix.numCols() );
    assertEquals(m.numRows(), row_sums_matrix.numRows() );
   
    assertEquals( 18.0, row_sums_matrix.get(0, 0), 0.0);
    assertEquals( 15.0, row_sums_matrix.get(1, 0), 0.0);
   
   
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    public static Matrix rand(int rows, int columns) {
        Matrix m = new DenseMatrix(rows, columns);

        java.util.Random rndGen = new java.util.Random();
        for ( int r = 0; r < m.numRows(); r++ ) {
         
          for ( int c = 0; c < m.numCols(); c++ ) {
           
            m.setQuick( r, c, rndGen.nextDouble() );
           
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