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Topic: Lapack spptrf function
Replies: 10   Last Post: Apr 12, 2013 11:08 AM

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Francesco Perrone

Posts: 39
Registered: 5/2/12
Re: Lapack spptrf function
Posted: Apr 10, 2013 1:42 PM
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Dear Mr. Lord,

yes I am aware of the function CHOL and I am already using it.

But CHOL gets tremendously slow when factorizing, e.g., a 1945*1945 matrix.

Within my code I call CHOL, within a 2048 iterations FOR loop, for three different matrices with the above mentioned size.

The elapsed time is about an hour.

For the same case, after downloading the LAPACK wrapper (http://www.mathworks.com/matlabcentral/fileexchange/16777-lapack), the elapsed time was around 17 min less than before: quite a bargain I'd urge.

Btw, after a bunch of tests, MATLAB started crashing at any time I tried calling the function: blatantly, I don't even have a clue why that happened.

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