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## MEX/Mkoctfile questions about matrices algorithms...why slower?

**From**: |
钟 伟生 |

**Subject**: |
MEX/Mkoctfile questions about matrices algorithms...why slower? |

**Date**: |
Tue, 14 Nov 2006 20:07:12 +0000 |

Dear All,

`I am trying to use the interface functions between MATLAB/OCTAVE and C to
``compute the matrices algorithms( like matrix-matrix multiplication and
``additon, matrix-vector multiplication ), such as MEX and DEFUN_DLD.
``However, after having compared with Matlab, I found the implemented with
``C/C++ are not faster than the same on in Matlab, moreover, it costs more
``about 30% time. I compared them both in big and small matrices
``multiplications.
`The results are the same as before.

`Are there good and bad ways of implementing matrix multiplication combining
``MATLAB/OCTAVE and C?
`
Thank you very much!
Best Regards,
Weisheng
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**MEX/Mkoctfile questions about matrices algorithms...why slower?**,
*钟 伟生* **<=**