Example usage for org.apache.commons.math.linear SparseRealMatrix setEntry

Introduction

In this page you can find the example usage for org.apache.commons.math.linear SparseRealMatrix setEntry.

Prototype

void setEntry(int row, int column, double value) throws MatrixIndexException;

Source Link

Document

Set the entry in the specified row and column.

Usage

From source file:org.interpss.core.sparse.UCTE2000SparseMatrixCasesTest.java

private SparseRealMatrix sparseMatrix2Ary(SparseEqnMatrix2x2 eqn) {
    int n = eqn.getDimension();
    System.out.println("J-matrix Demension:" + n);
    //RealMatrix m = new Array2DRowRealMatrix( n, n );
    SparseRealMatrix m = new OpenMapRealMatrix(n, n);
    int n_2 = n / 2;
    for (int i = 0; i < n_2; i++) { // index 1-N
        for (int j = 0; j < n_2; j++) {//index 1-N
            Matrix_xy mxy = eqn.getA(i + 1, j + 1);
            if (mxy.xx != 0.0)
                m.setEntry(2 * i, 2 * j, mxy.xx);
            if (mxy.xy != 0.0)
                m.setEntry(2 * i, 2 * j + 1, mxy.xy);
            if (mxy.yx != 0.0)
                m.setEntry(2 * i + 1, 2 * j, mxy.yx);
            if (mxy.yy != 0.0)
                m.setEntry(2 * i + 1, 2 * j + 1, mxy.yy);
        }/*from   w ww . j av  a 2  s.c o m*/
    }
    return m;
}

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