Andrew Knyazev

Last seen: 18일 전 | 2010년부터 활동

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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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Newton's method done right
Newton's method for solving systems of nonlinear equations, including nonsquare and inconsistent

18일 전 | 다운로드 수: 7 |

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Laplacian in 1D, 2D, or 3D
Sparse (1-3)D Laplacian on a rectangular grid with exact analytic eigenpairs.

6개월 전 | 다운로드 수: 5 |

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

3년 초과 전 | 0

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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...

3년 초과 전 | 0

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

3년 초과 전 | 0

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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...

대략 4년 전 | 0

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

대략 4년 전 | 다운로드 수: 4 |

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

4년 초과 전 | 다운로드 수: 5 |

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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...

6년 초과 전 | 0

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

6년 초과 전 | 14

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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...

7년 초과 전 | 0

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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...

7년 초과 전 | 0

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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...

7년 초과 전 | 0

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

7년 초과 전 | 0

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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...

7년 초과 전 | 1

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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...

7년 초과 전 | 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...

7년 초과 전 | 0

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

10년 초과 전 | 0

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

10년 초과 전 | 1

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

10년 초과 전 | 0

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

10년 초과 전 | 0

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

10년 초과 전 | 0

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

10년 초과 전 | 0

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Parallel computing of eigs
check SLEPc and BLOPEX

10년 초과 전 | 1

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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...

10년 초과 전 | 0

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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...

10년 초과 전 | 0

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

10년 초과 전 | 0

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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

10년 초과 전 | 0

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

10년 초과 전 | 0

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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

10년 초과 전 | 0