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Re: Convolving speed issue [message #59834 is a reply to message #59831]

Fri, 18 April 2008 02:16

rogass
Messages: 200
Registered: April 2008

Senior Member

Thank you again, Paolo. Your code works better and much faster than
mine one- but unfortunately only for small matrices. I tried to build
the code for the method presented here:

http://www.mathworks.com/access/helpdesk/help/techdoc/index. html?/access/helpdesk/help/techdoc/ref/conv2.html&http:/ /www.google.com/search?q=conv2

I don't understand, why it works for small matrices and not for big
ones. Maybe its depending on how differ the number of elements in each
dimension of each matrix.

The FFT method has also the same problem.

Any other solutions or recommendations, why it won't work with medium
matrices e.g. a[0:35,0:59] and b[0:59,0:119]

Maybe with reform(rebin...

Thanks and best regards

Chris

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[Message index]

		Re: Convolving speed issue By: pgrigis on Fri, 18 April 2008 06:17
		Re: Convolving speed issue By: rogass on Fri, 18 April 2008 02:16
		Re: Convolving speed issue By: rogass on Fri, 18 April 2008 01:13
		Re: Convolving speed issue By: pgrigis on Thu, 17 April 2008 13:42
		Re: Convolving speed issue By: pgrigis on Thu, 17 April 2008 13:03
		Re: Convolving speed issue By: rogass on Thu, 17 April 2008 11:54
		Re: Convolving speed issue By: pgrigis on Thu, 17 April 2008 10:16
		Re: Convolving speed issue By: rogass on Mon, 21 April 2008 08:08

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