Re: Convolving speed issue

Dear Paolo,
yes, it isnt so much slower. I could also use fftw, which is available
for matlab and also for IDL. But nevertheless, I had to convolve it
directly and not in frequency domain. The problem is that the matrices
could be very large (their size is changing dynamically) and there are
also some iterations (nearly 200) for each convolve. So I always try
to use as often as possible reform, replicate and rebin, because those
are very fast for manipulating or computing arrays.

But, unfortnately I'm not able to exchange the for-to loops
completely. I think, it's quite difficult to do this in the way I
mentioned above.

But thanks again for answer, Paolo

Any other ideas?

Best regards

Chris