and what are their performance difference?

Thanks,

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and what are their performance difference?

Thanks,

Thanks,

- bsmile
**Posts:**8**Joined:**Sat Dec 04, 2010 2:40 pm

Here is the difference:

- eigenvalues only: SYEV

- eigenvectors and eigenvalues:

* subset computation: SYEVR or SYEVX

* all eigenvectors: SYEVD or SYEVR or SYEVX

Which one is faster depends on the matrices.

See, for example:

http://www.netlib.org/lapack/lawnspdf/lawn182.pdf

- eigenvalues only: SYEV

- eigenvectors and eigenvalues:

* subset computation: SYEVR or SYEVX

* all eigenvectors: SYEVD or SYEVR or SYEVX

Which one is faster depends on the matrices.

See, for example:

http://www.netlib.org/lapack/lawnspdf/lawn182.pdf

- admin
- Site Admin
**Posts:**586**Joined:**Wed Dec 08, 2004 7:07 pm

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