Community Profile

photo

Andrew Knyazev


Last seen: 8일 전 2010년부터 활동

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.

통계

All
  • Personal Best Downloads Level 2
  • First Review
  • 5-Star Galaxy Level 4
  • GitHub Submissions Level 1
  • First Submission
  • Revival Level 3
  • Knowledgeable Level 2
  • 3 Month Streak
  • First Answer

배지 보기

Content Feed

보기 기준

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

거의 2년 전 | 0

답변 있음
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...

거의 2년 전 | 0

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

거의 2년 전 | 0

답변 있음
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...

2년 초과 전 | 0

| 수락됨

제출됨


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

2년 초과 전 | 다운로드 수: 2 |

제출됨


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

거의 3년 전 | 다운로드 수: 13 |

Thumbnail

답변 있음
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...

거의 5년 전 | 0

| 수락됨

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

거의 5년 전 | 14

| 수락됨

답변 있음
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...

5년 초과 전 | 0

답변 있음
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...

5년 초과 전 | 0

답변 있음
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...

5년 초과 전 | 0

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

5년 초과 전 | 0

답변 있음
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...

5년 초과 전 | 1

답변 있음
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...

5년 초과 전 | 0

답변 있음
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...

5년 초과 전 | 0

| 수락됨

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

거의 9년 전 | 1

답변 있음
Number of eigenvalues when using eigs
This is normal for eigs.

거의 9년 전 | 0

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

거의 9년 전 | 0

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

거의 9년 전 | 0

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

거의 9년 전 | 0

| 수락됨

답변 있음
Parallel computing of eigs
check SLEPc and BLOPEX

거의 9년 전 | 1

답변 있음
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...

거의 9년 전 | 0

답변 있음
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...

거의 9년 전 | 0

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

거의 9년 전 | 0

답변 있음
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

거의 9년 전 | 0

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

거의 9년 전 | 0

답변 있음
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

거의 9년 전 | 0

답변 있음
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

거의 9년 전 | 0

제출됨


ortha.m
Orthonormalization Relative to matrix A

거의 9년 전 | 다운로드 수: 1 |

더 보기