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Re: large matrix operations [message #62904 is a reply to message #62901]

Mon, 13 October 2008 09:00

Vince Hradil
Messages: 574
Registered: December 1999

Senior Member

On Oct 13, 10:08 am, Vince Hradil <vincehra...@gmail.com> wrote:
> On Oct 13, 9:44 am, arp...@gmail.com wrote:
>
>> It seems that very large matrix, e.g.1.0e6*1.0e5*100 operations, such
>> as multiplication and matrix multiplication, in IDL is very slow.
>> Anyone know how to speed up large matrix operations ?
>
> Multiplication should be pretty fast. Matrix multiplication can be
> slow if you have to transpose the matrices. This can be sped up by
> using MatrixMultiply() instead of # or ##. Perhaps Temporary() can be
> used to avoid allocation of extra memory. I think David has the best
> ideas, though.

oops, that should be MATRIX_MULTIPY()

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[Message index]

		Re: large matrix operations By: Vince Hradil on Tue, 14 October 2008 06:10
		Re: large matrix operations By: Michael Galloy on Mon, 13 October 2008 15:14
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 14:17
		Re: large matrix operations By: Michael Galloy on Mon, 13 October 2008 13:51
		Re: large matrix operations By: David Fanning on Mon, 13 October 2008 10:39
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 10:07
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 09:00
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 08:08
		Re: large matrix operations By: David Fanning on Mon, 13 October 2008 08:04

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