Risposto
How can the Cholesky decomposition step in eigs() be avoided without passing a matrix to eigs that is a Cholesky decomposition?
check http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

oltre 10 anni fa | 0

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ortha.m
Orthonormalization Relative to matrix A

oltre 10 anni fa | 1 download |

5.0 / 5

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subspace.m
Angle between subspaces.

oltre 10 anni fa | 1 download |

3.7 / 5

Inviato


majorization check
checks if X is (weakly) majorized by Y, where X and Y must be numeric arrays.

oltre 10 anni fa | 2 download |

0.0 / 5

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pcg.m with 'null' and 'flex' options
Preconditioned Conjugate Gradients handles homogeneous equations and nonsymmetric preconditioning

oltre 10 anni fa | 3 download |

4.0 / 5
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Best polynomial approximation in uniform norm
For a given function on an interval, the code calculates the min-max approximation by a polynomial.

oltre 10 anni fa | 3 download |

0.0 / 5
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ODE Tutorial Demo
Advanced examples of using the MATLAB Symbolic Math Toolbox for Ordinary Differential Equations

oltre 10 anni fa | 1 download |

0.0 / 5
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Risposto
eigs with sparse matrices
try my http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m instead

oltre 14 anni fa | 0

Risposto
Memory requirements of lobpcg: Matlab and hypre implementation differences
Have you actually tried the development version of SLEPc? The one that one gets by svn checkout http://www.grycap.upv.es/sle...

oltre 14 anni fa | 0

Risposto
Memory requirements of lobpcg: Matlab and hypre implementation differences
The development version of SLEPc incorporates BLOPEX now, see http://code.google.com/p/blopex/wiki/PETScInstallDevel so that yo...

oltre 14 anni fa | 0

Risposto
Memory requirements of lobpcg: Matlab and hypre implementation differences
Please try adding the following options to the ij driver: "-hmis -agg_nl 1 -interptype 6 -Pmx 4" These are proposed by a member ...

oltre 14 anni fa | 0

Risposto
Memory requirements of lobpcg: Matlab and hypre implementation differences
The lobpcg code in hypre is very similar to the MATLAB code, and uses about the same memory. The BoomerAMG preconditioner requir...

oltre 14 anni fa | 0

| accettato

Risposto
lobpcg returning incorrect results for large sparse symmetric matrices
Very slow convergence is an expected normal behavior of lobpcg for such a problem, without preconditioning. Unfortunately, I am ...

oltre 14 anni fa | 1

| accettato

Inviato


matlab2hypre and hypre2matlab
Read and write files with sparse matrices and vectors in hypre format

oltre 15 anni fa | 2 download |

5.0 / 5