Examples of Array2DRowRealMatrix

org.apache.commons.math.linear.Array2DRowRealMatrix

ath.gatech.edu/~bourbaki/math2601/Web-notes/2num.pdf"> LU decomposition to support linear system solution and inverse.

The LU decomposition is performed as needed, to support the following operations:

solve
isSingular
getDeterminant
inverse

Usage notes:

The LU decomposition is cached and reused on subsequent calls. If data are modified via references to the underlying array obtained using getDataRef(), then the stored LU decomposition will not be discarded. In this case, you need to explicitly invoke LUDecompose() to recompute the decomposition before using any of the methods above.
As specified in the {@link RealMatrix} interface, matrix element indexingis 0-based -- e.g., getEntry(0, 0) returns the element in the first row, first column of the matrix.

@version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $

org.apache.commons.math3.linear.Array2DRowRealMatrix

Implementation of {@link RealMatrix} using a {@code double[][]} array tostore entries. @version $Id: Array2DRowRealMatrix.java 1296537 2012-03-03 00:45:19Z sebb $

        for (int r = 0; r < m.getRowDimension(); r++) {
            for (int c = 0; c < m.getColumnDimension(); c++) {
                d[r][c] = m.getEntry(r, c) / n.getEntry(r, c);
            }
        }
        return new Array2DRowRealMatrix(d, false);
    }

        for (int r = 0; r < m.getRowDimension(); r++) {
            for (int c = 0; c < cols.length; c++) {
                d[r][c] = m.getEntry(r, cols[c]);
            }
        }
        return new Array2DRowRealMatrix(d, false);
    }

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of Array2DRowRealMatrix

Examples of org.apache.commons.math3.linear.Array2DRowRealMatrix

Examples of org.apache.commons.math3.linear.Array2DRowRealMatrix