Andrew Knyazev
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http://en.wikipedia.org/wiki/Andrei_Knyazev_(mathematician) Professional Interests: matrix computations, numerical PDEs, signal, image & video processing, data analytics and mining, data coding and transmission, material sciences, and model predictive control.
MATLAB, Python, Fortran
Spoken Languages:
English
Statistiques
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Feeds
A soumis
Locally Optimal Block Preconditioned Conjugate Gradient
LOBPCG solves Hermitian partial generalized eigenvalue problems optionally using preconditioning, as well as PCA
environ un mois il y a | 6102 téléchargements |
A soumis
Laplacian in 1D, 2D, or 3D
Sparse (1-3)D Laplacian on a rectangular grid with exact analytic eigenpairs.
environ un mois il y a | 5253 téléchargements |
A soumis
Sparse nD Laplacian with analytic eigenpairs.
Sparse nD Laplacian on a rectangular grid with exact analytic eigenpairs.
environ un mois il y a | 2 téléchargements |
A soumis
Newton's method done right
Newton's method for solving systems of nonlinear equations, including nonsquare and inconsistent
11 mois il y a | 2195 téléchargements |
How can I get Matlab toolbox KSSOLV? In which package is it?
https://bitbucket.org/berkeleylab/kssolv2.0/src/release/
plus de 4 ans il y a | 0
Spectral clustering a grpah into k cluster
asdamle/QR-spectral-clustering: Code implements the methodology in arXiv:1609.08251 for multi-way spectral clustering (github.co...
plus de 4 ans il y a | 0
eigs with big sparse matrix has Internal error
try running Locally Optimal Block Preconditioned Conjugate Gradient - File Exchange - MATLAB Central (mathworks.com)
plus de 4 ans il y a | 0
The eigenvalues of eigs change with the input target, Why?
This may be expected. One can fix it by running with muiltiple targets, collecting all the resulting eigenvectors and writing an...
presque 5 ans il y a | 0
| A accepté
A soumis
subspacea - Angles between subspaces
Angles between subspaces and canonical correlations in general scalar products.
presque 5 ans il y a | 3980 téléchargements |
Eigs in multinode cluster
EIGS has limited support for distributed memory, so you can run it only on a single node, but see the answer from Christine Tob...
plus de 7 ans il y a | 0
| A accepté
How do read .npy files in matlab?
https://github.com/kwikteam/npy-matlab
plus de 7 ans il y a | 14
| A accepté
Error returned in Eigs Function " Undefined operator '.*' "
Looks like a bug in chebfun - just make this comment at <https://www.mathworks.com/matlabcentral/fileexchange/47023-chebfun-curr...
environ 8 ans il y a | 0
eigs does not return the eigenvalues closest to shift sigma
You may also want to try https://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m passing your function handle to it. Co...
environ 8 ans il y a | 0
find eigenvalues of a very large sparse matrix
If the matrix is real symmetric or Hermitian, you may also want to try https://www.mathworks.com/matlabcentral/fileexchange/48-l...
environ 8 ans il y a | 0
LOBPCG Initial k eigenvectors approximation
See https://en.wikipedia.org/wiki/LOBPCG#Convergence_theory_and_practice
environ 8 ans il y a | 0
eigs() runs faster for more eigenvalues of the same matrix
Please check <https://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m> that has probably faster and more predictable co...
environ 8 ans il y a | 1
How do i obtain only the first principal component?
https://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m can be used as the method for calculating the eigenvector corre...
environ 8 ans il y a | 0
Smallest non-zero eigenvalue for a generalized eigenvalue problem
Since both matrices A and B are singular, it is not an easy problem numerically. Even eig(full(A), full(B)) may give you wrong a...
environ 8 ans il y a | 0
| A accepté
How to parallel for the computation of eigensystem of a sparse matrix
use SLEPc
plus de 11 ans il y a | 0
Find max/min eigenvalue of a symmetric matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
plus de 11 ans il y a | 1
Number of eigenvalues when using eigs
This is normal for eigs.
plus de 11 ans il y a | 0
positive-definiteness of a huge sparse matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
plus de 11 ans il y a | 0
how can i find k-eigenvalues faster than eig for hermitian dense matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
plus de 11 ans il y a | 0
Take advantage of Hermitian matrices with eigs
You need to be more specific. Also, try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
plus de 11 ans il y a | 0
| A accepté
Sparse solver for large symmetric matrices
both eigs and http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m can be used in a matrix-free fashion, only needing...
plus de 11 ans il y a | 0
Difference between eigs and eig
Is this behavior expected? - Yes. Eigs uses a tricky method that may give the results you describe, especially for funny mat...
plus de 11 ans il y a | 0
eigs function: incorrect eigenvectors
This is normal for eigs. If you are happy with eig, just stay with it.
plus de 11 ans il y a | 0
Why can't I compute the interior eigenvalues of a sparse matrix with "eigs" without inversion in MATLAB?
check https://www.mathworks.com/matlabcentral/fileexchange/48-locally-optimal-block-preconditioned-conjugate-gradient
plus de 11 ans il y a | 0
How can I get the (approximate) eigenvectors of a huge matrix?
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
plus de 11 ans il y a | 0
