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.
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Submitted
Laplacian in 1D, 2D, or 3D
Sparse (1-3)D Laplacian on a rectangular grid with exact analytic eigenpairs.
4 maanden ago | 5 downloads |
How can I get Matlab toolbox KSSOLV? In which package is it?
https://bitbucket.org/berkeleylab/kssolv2.0/src/release/
meer dan 3 jaar ago | 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...
meer dan 3 jaar ago | 0
eigs with big sparse matrix has Internal error
try running Locally Optimal Block Preconditioned Conjugate Gradient - File Exchange - MATLAB Central (mathworks.com)
meer dan 3 jaar ago | 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...
bijna 4 jaar ago | 0
| accepted
Submitted
subspacea - Angles between subspaces
Angles between subspaces and canonical correlations in general scalar products.
bijna 4 jaar ago | 4 downloads |
Submitted
Locally Optimal Block Preconditioned Conjugate Gradient
LOBPCG solves Hermitian partial generalized eigenvalue problems using preconditioning, as well as PCA
meer dan 4 jaar ago | 9 downloads |
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...
meer dan 6 jaar ago | 0
| accepted
How do read .npy files in matlab?
https://github.com/kwikteam/npy-matlab
meer dan 6 jaar ago | 14
| accepted
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...
ongeveer 7 jaar ago | 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...
ongeveer 7 jaar ago | 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...
ongeveer 7 jaar ago | 0
LOBPCG Initial k eigenvectors approximation
See https://en.wikipedia.org/wiki/LOBPCG#Convergence_theory_and_practice
ongeveer 7 jaar ago | 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...
ongeveer 7 jaar ago | 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...
ongeveer 7 jaar ago | 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...
ongeveer 7 jaar ago | 0
| accepted
How to parallel for the computation of eigensystem of a sparse matrix
use SLEPc
meer dan 10 jaar ago | 0
Find max/min eigenvalue of a symmetric matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
meer dan 10 jaar ago | 1
positive-definiteness of a huge sparse matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
meer dan 10 jaar ago | 0
how can i find k-eigenvalues faster than eig for hermitian dense matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
meer dan 10 jaar ago | 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
meer dan 10 jaar ago | 0
| accepted
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...
meer dan 10 jaar ago | 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...
meer dan 10 jaar ago | 0
eigs function: incorrect eigenvectors
This is normal for eigs. If you are happy with eig, just stay with it.
meer dan 10 jaar ago | 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
meer dan 10 jaar ago | 0
How can I get the (approximate) eigenvectors of a huge matrix?
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
meer dan 10 jaar ago | 0
How can I speed up the eigen value and eigen vector computations for a non-sparse matrix?
check http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m
meer dan 10 jaar ago | 0
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
meer dan 10 jaar ago | 0
