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

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);
    }

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        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);
    }

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

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

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        if (m.getColumnDimension() == 1) {
            double[][] d = new double[m.getRowDimension()][m.getRowDimension()];
            for (int i = 0; i < m.getRowDimension(); i++) {
                d[i][i] = m.getEntry(i, 0);
            }
            return new Array2DRowRealMatrix(d, false);
        } else {
            double[][] d = new double[m.getRowDimension()][1];
            for (int i = 0; i < m.getColumnDimension(); i++) {
                d[i][0] = m.getEntry(i, i);
            }
            return new Array2DRowRealMatrix(d, false);
        }
    }

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    private static RealMatrix ones(int n, int m) {
        double[][] d = new double[n][m];
        for (int r = 0; r < n; r++) {
            Arrays.fill(d[r], 1.0);
        }
        return new Array2DRowRealMatrix(d, false);
    }

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        for (int r = 0; r < n; r++) {
            if (r < m) {
                d[r][r] = 1;
            }
        }
        return new Array2DRowRealMatrix(d, false);
    }

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     * @param n Number of rows.
     * @param m Number of columns.
     * @return n-by-m matrix of 0.0-values.
     */
    private static RealMatrix zeros(int n, int m) {
        return new Array2DRowRealMatrix(n, m);
    }

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        for (int r = 0; r < n * rd; r++) {
            for (int c = 0; c < m * cd; c++) {
                d[r][c] = mat.getEntry(r % rd, c % cd);
            }
        }
        return new Array2DRowRealMatrix(d, false);
    }

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        double value = start;
        for (int r = 0; r < size; r++) {
            d[r][0] = value;
            value += step;
        }
        return new Array2DRowRealMatrix(d, false);
    }

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