Andrew Knyazev

Last seen: 29 days 前 | 自 2010 起处于活动状态

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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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How can I get Matlab toolbox KSSOLV? In which package is it?
https://bitbucket.org/berkeleylab/kssolv2.0/src/release/

2 years 前 | 0

已回答
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...

2 years 前 | 0

已回答
eigs with big sparse matrix has Internal error
try running Locally Optimal Block Preconditioned Conjugate Gradient - File Exchange - MATLAB Central (mathworks.com)

2 years 前 | 0

已回答
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...

2 years 前 | 0

| 已接受

已提交

subspacea - Angles between subspaces
Angles between subspaces and canonical correlations in general scalar products.

2 years 前 | 5 次下载 |

已提交

Locally Optimal Block Preconditioned Conjugate Gradient
LOBPCG solves Hermitian partial generalized eigenvalue problems using preconditioning, as well as PCA

3 years 前 | 15 次下载 |

已回答
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...

5 years 前 | 0

| 已接受

已回答
How do read .npy files in matlab?
https://github.com/kwikteam/npy-matlab

5 years 前 | 14

| 已接受

已回答
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...

5 years 前 | 0

已回答
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...

5 years 前 | 0

已回答
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...

5 years 前 | 0

已回答
LOBPCG Initial k eigenvectors approximation
See https://en.wikipedia.org/wiki/LOBPCG#Convergence_theory_and_practice

5 years 前 | 0

已回答
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...

5 years 前 | 1

已回答
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...

5 years 前 | 0

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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...

5 years 前 | 0

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已回答
How to parallel for the computation of eigensystem of a sparse matrix
use SLEPc

9 years 前 | 0

已回答
Find max/min eigenvalue of a symmetric matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

9 years 前 | 1

已回答
Number of eigenvalues when using eigs
This is normal for eigs.

9 years 前 | 0

已回答
positive-definiteness of a huge sparse matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

9 years 前 | 0

已回答
how can i find k-eigenvalues faster than eig for hermitian dense matrix
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

9 years 前 | 0

已回答
Take advantage of Hermitian matrices with eigs
You need to be more specific. Also, try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

9 years 前 | 0

| 已接受

已回答
Parallel computing of eigs
check SLEPc and BLOPEX

9 years 前 | 1

已回答
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...

9 years 前 | 0

已回答
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...

9 years 前 | 0

已回答
eigs function: incorrect eigenvectors
This is normal for eigs. If you are happy with eig, just stay with it.

9 years 前 | 0

已回答
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

9 years 前 | 0

已回答
How can I get the (approximate) eigenvectors of a huge matrix?
try http://www.mathworks.com/matlabcentral/fileexchange/48-lobpcg-m

9 years 前 | 0

已回答
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

9 years 前 | 0

已回答
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

9 years 前 | 0

已提交

ortha.m
Orthonormalization Relative to matrix A

9 years 前 | 1 次下载 |

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Andrew Knyazev

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