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Re: Vectorization question [message #21736 is a reply to message #21705]

Mon, 18 September 2000 00:00

promashkin
Messages: 169
Registered: December 1999

Senior Member

In fact, my first idea was to try Histogram to do this. But I could
never claim I reached perfection with it, as Craig did.
I tested the code, and here are the results (once I converted A and B to
FLOAT to clear the embarassing "floating illegal operand" that was
produced by my code when operating on LONG type arrays):

IDL> liam, a, b, x
% Array requires more memory than IDL can address.
% Execution halted at: LIAM 40 untitled_1.pro
% $MAIN$
IDL> pavel, a, b, x, iter=10
5.6166667
IDL> craig, a, b, x, iter=10
4.7333333

Just as I expected, Craig's code is more efficient than mine (the magic
of Histogram!). Good answer to those "when to use a loop" questions.
IDL 5.3, PowerMac G4-400.
Cheers,
Pavel

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[Message index]

		Vectorization question By: Liam E. Gumley on Mon, 11 September 2000 14:51
		Re: Vectorization question By: Craig Markwardt on Mon, 18 September 2000 00:00
		Re: Vectorization question By: promashkin on Mon, 18 September 2000 00:00
		Re: Vectorization question By: promashkin on Sun, 17 September 2000 00:00
		Re: Vectorization question By: Struan Gray on Fri, 15 September 2000 00:00
		Re: Vectorization question By: Liam E. Gumley on Thu, 14 September 2000 00:00
		Re: Vectorization question By: Liam E. Gumley on Thu, 14 September 2000 00:00
		Re: Vectorization question By: Liam E. Gumley on Thu, 14 September 2000 00:00
		Re: Vectorization question By: Liam E. Gumley on Thu, 14 September 2000 00:00
		Re: Vectorization question By: Liam E. Gumley on Thu, 14 September 2000 00:00

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