Example usage for org.apache.commons.math3.linear RealMatrix walkInColumnOrder

Introduction

In this page you can find the example usage for org.apache.commons.math3.linear RealMatrix walkInColumnOrder.

Prototype

double walkInColumnOrder(RealMatrixPreservingVisitor visitor);

Source Link

Document

Visit (but don't change) all matrix entries in column order.

Usage

From source file:lirmm.inria.fr.math.BigSparseRealMatrixTest.java

@Test
public void testWalk() {
    int rows = 150;
    int columns = 75;

    RealMatrix m = new BigSparseRealMatrix(rows, columns);
    m.walkInRowOrder(new SetVisitor());
    GetVisitor getVisitor = new GetVisitor();
    m.walkInOptimizedOrder(getVisitor);/*w w w.  j av  a 2  s .  c om*/
    Assert.assertEquals(rows * columns, getVisitor.getCount());

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInRowOrder(new SetVisitor(), 1, rows - 2, 1, columns - 2);
    getVisitor = new GetVisitor();
    m.walkInOptimizedOrder(getVisitor, 1, rows - 2, 1, columns - 2);
    Assert.assertEquals((rows - 2) * (columns - 2), getVisitor.getCount());
    for (int i = 0; i < rows; ++i) {
        Assert.assertEquals(0.0, m.getEntry(i, 0), 0);
        Assert.assertEquals(0.0, m.getEntry(i, columns - 1), 0);
    }
    for (int j = 0; j < columns; ++j) {
        Assert.assertEquals(0.0, m.getEntry(0, j), 0);
        Assert.assertEquals(0.0, m.getEntry(rows - 1, j), 0);
    }

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInColumnOrder(new SetVisitor());
    getVisitor = new GetVisitor();
    m.walkInOptimizedOrder(getVisitor);
    Assert.assertEquals(rows * columns, getVisitor.getCount());

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInColumnOrder(new SetVisitor(), 1, rows - 2, 1, columns - 2);
    getVisitor = new GetVisitor();
    m.walkInOptimizedOrder(getVisitor, 1, rows - 2, 1, columns - 2);
    Assert.assertEquals((rows - 2) * (columns - 2), getVisitor.getCount());
    for (int i = 0; i < rows; ++i) {
        Assert.assertEquals(0.0, m.getEntry(i, 0), 0);
        Assert.assertEquals(0.0, m.getEntry(i, columns - 1), 0);
    }
    for (int j = 0; j < columns; ++j) {
        Assert.assertEquals(0.0, m.getEntry(0, j), 0);
        Assert.assertEquals(0.0, m.getEntry(rows - 1, j), 0);
    }

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInOptimizedOrder(new SetVisitor());
    getVisitor = new GetVisitor();
    m.walkInRowOrder(getVisitor);
    Assert.assertEquals(rows * columns, getVisitor.getCount());

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInOptimizedOrder(new SetVisitor(), 1, rows - 2, 1, columns - 2);
    getVisitor = new GetVisitor();
    m.walkInRowOrder(getVisitor, 1, rows - 2, 1, columns - 2);
    Assert.assertEquals((rows - 2) * (columns - 2), getVisitor.getCount());
    for (int i = 0; i < rows; ++i) {
        Assert.assertEquals(0.0, m.getEntry(i, 0), 0);
        Assert.assertEquals(0.0, m.getEntry(i, columns - 1), 0);
    }
    for (int j = 0; j < columns; ++j) {
        Assert.assertEquals(0.0, m.getEntry(0, j), 0);
        Assert.assertEquals(0.0, m.getEntry(rows - 1, j), 0);
    }

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInOptimizedOrder(new SetVisitor());
    getVisitor = new GetVisitor();
    m.walkInColumnOrder(getVisitor);
    Assert.assertEquals(rows * columns, getVisitor.getCount());

    m = new BigSparseRealMatrix(rows, columns);
    m.walkInOptimizedOrder(new SetVisitor(), 1, rows - 2, 1, columns - 2);
    getVisitor = new GetVisitor();
    m.walkInColumnOrder(getVisitor, 1, rows - 2, 1, columns - 2);
    Assert.assertEquals((rows - 2) * (columns - 2), getVisitor.getCount());
    for (int i = 0; i < rows; ++i) {
        Assert.assertEquals(0.0, m.getEntry(i, 0), 0);
        Assert.assertEquals(0.0, m.getEntry(i, columns - 1), 0);
    }
    for (int j = 0; j < columns; ++j) {
        Assert.assertEquals(0.0, m.getEntry(0, j), 0);
        Assert.assertEquals(0.0, m.getEntry(rows - 1, j), 0);
    }
}

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