Examples of org.apache.commons.math.linear.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) $

            final double[] msI = multistep[i];
            for (int j = 0; j < first.length; ++j) {
                msI[j] -= first[j];
            }
        }
        return initialization.multiply(new Array2DRowRealMatrix(multistep, false));
    }

View Full Code Here

  private final double[][] uHat;


  public EigenSolverWrapper(double[][] bbt) {
    int dim = bbt.length;
    EigenDecomposition evd2 = new EigenDecompositionImpl(
        new Array2DRowRealMatrix(bbt), 0);
    eigenvalues = evd2.getRealEigenvalues();
    RealMatrix uHatrm = evd2.getV();
    uHat = new double[dim][];
    for (int i = 0; i < dim; i++) {
      uHat[i] = uHatrm.getRow(i);

View Full Code Here

   * @param x An OG 2-D matrix of doubles, not null
   * @return A Commons matrix
   */
  public static RealMatrix wrap(final DoubleMatrix2D x) {
    Validate.notNull(x);
    return new Array2DRowRealMatrix(x.getData());
  }

View Full Code Here

    final int n = x.getNumberOfElements();
    final double[][] y = new double[n][1];
    for (int i = 0; i < n; i++) {
      y[i][0] = x.getEntry(i);
    }
    return new Array2DRowRealMatrix(x.getData());
  }

View Full Code Here

        d[i][i] = Math.pow(rEigenValues[i], p);
        if (iEigenValues[i] != 0.0) {
          throw new NotImplementedException("Cannot handle complex eigenvalues in getPower");
        }
      }
      final RealMatrix res = eigen.getV().multiply((new Array2DRowRealMatrix(d)).multiply(eigen.getVT()));
      return CommonsMathWrapper.unwrap(res);
    }
    throw new IllegalArgumentException("Can only find pow of DoubleMatrix2D; have " + m.getClass());
  }

View Full Code Here

0 1 2 3 4 5

TOP

Related Classes of org.apache.commons.math.linear.Array2DRowRealMatrix

ch.bfh.ti.kybernetik.engine.controller.DefaultSimulatorImpl

com.opengamma.analytics.math.matrix.CommonsMatrixAlgebra

com.opengamma.analytics.math.util.wrapper.CommonsMathWrapper

org.apache.commons.math.ode.nonstiff.AdamsBashforthIntegrator

org.apache.commons.math.ode.nonstiff.AdamsMoultonIntegrator

org.apache.commons.math.ode.nonstiff.AdamsNordsieckTransformer

org.apache.commons.math.ode.sampling.NordsieckStepInterpolator

org.apache.commons.math.optimization.direct.NelderMeadTest

org.apache.commons.math.optimization.linear.SimplexTableau

org.apache.commons.math.stat.correlation.CovarianceTest

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.