/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapColumns(int i, int j) { swap(columnPivot, columnUnpivot, i, j); }
@Override public Matrix matrixFactory(double[][] values) { Matrix base = new DenseMatrix(values); // for general tests, we just make a scrambled matrix and fill it // with the standard data. Then we can test the details of the // row and/or column swapping separately. PivotedMatrix pm = new PivotedMatrix(base.like()); pm.swap(0, 1); pm.swapRows(1, 2); pm.assign(base); return pm; }
/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapRows(int i, int j) { swap(rowPivot, rowUnpivot, i, j); }
@Override public Matrix matrixFactory(double[][] values) { Matrix base = new DenseMatrix(values); // for general tests, we just make a scrambled matrix and fill it // with the standard data. Then we can test the details of the // row and/or column swapping separately. PivotedMatrix pm = new PivotedMatrix(base.like()); pm.swap(0, 1); pm.swapRows(1, 2); pm.assign(base); return pm; }
L.swap(k, pivot);
@Test public void testSwap() { Matrix m = new DenseMatrix(10, 10); for (int i = 0; i < 10; i++) { for (int j = 0; j < 10; j++) { m.set(i, j, 10 * i + j); } } PivotedMatrix pm = new PivotedMatrix(m); pm.swap(3, 5); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 22, 55, 44, 33, 66, 77, 88, 99})).norm(1), 1.0e-10); pm.swap(2, 7); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 77, 55, 44, 33, 66, 22, 88, 99})).norm(1), 1.0e-10); pm.swap(5, 8); assertEquals(0, pm.viewColumn(4).minus( new DenseVector(new double[]{4.0,14.0,74.0,54.0,44.0,84.0,64.0,24.0,34.0,94.0})).norm(1), 1.0e-10); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 77, 55, 44, 88, 66, 22, 33, 99})).norm(1), 1.0e-10); } }
/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapRows(int i, int j) { swap(rowPivot, rowUnpivot, i, j); }
/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapColumns(int i, int j) { swap(columnPivot, columnUnpivot, i, j); }
/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapRows(int i, int j) { swap(rowPivot, rowUnpivot, i, j); }
/** * Swaps indexes i and j. This does just row permutation. * * @param i First index to swap. * @param j Second index to swap. */ public void swapColumns(int i, int j) { swap(columnPivot, columnUnpivot, i, j); }
L.swap(k, pivot);
L.swap(k, pivot);
@Test public void testSwap() { Matrix m = new DenseMatrix(10, 10); for (int i = 0; i < 10; i++) { for (int j = 0; j < 10; j++) { m.set(i, j, 10 * i + j); } } PivotedMatrix pm = new PivotedMatrix(m); pm.swap(3, 5); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 22, 55, 44, 33, 66, 77, 88, 99})).norm(1), 1.0e-10); pm.swap(2, 7); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 77, 55, 44, 33, 66, 22, 88, 99})).norm(1), 1.0e-10); pm.swap(5, 8); assertEquals(0, pm.viewColumn(4).minus( new DenseVector(new double[]{4.0,14.0,74.0,54.0,44.0,84.0,64.0,24.0,34.0,94.0})).norm(1), 1.0e-10); assertEquals(0, pm.viewDiagonal().minus( new DenseVector(new double[]{0, 11, 77, 55, 44, 88, 66, 22, 33, 99})).norm(1), 1.0e-10); } }