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Re: efficient kernel or masking algorithm ? [message #22773 is a reply to message #22645]

Thu, 30 November 2000 00:00

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"J.D. Smith" <jdsmith@astro.cornell.edu> writes:
...
> While I'm on the gripe train, why shouldn't we be able to consistently
> perform operations along any dimension of an array we like with relevant
> IDL routines. E.g., we can total along a single dimension. All due
> respect to Craig's CMAPPLY function, but some of these things should be
> much faster. Resorting to summed logarithms for multiplication is not
> entirely dubious, but why shouldn't we be able to say:
...

Agree! Agree! Agree! For once we are griping in synchrony :-)

These are exactly the kinds of operations that would be enhanced by
vectorization, but they can't as IDL stands now.

By the way, CMAPPLY doesn't use summed logarithms any more. It uses
my bestest algorithm that came out of the recent newsgroup discussion.

Craig

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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		efficient kernel or masking algorithm ? By: Richard Tyc on Wed, 29 November 2000 00:00
		Re: efficient kernel or masking algorithm ? By: Craig Markwardt on Fri, 01 December 2000 00:00
		Re: efficient kernel or masking algorithm ? By: John-David T. Smith on Thu, 30 November 2000 00:00
		Re: efficient kernel or masking algorithm ? By: Craig Markwardt on Thu, 30 November 2000 00:00

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