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Re: JBIU utilities - release 1.0 [message #60796 is a reply to message #60794]

Fri, 13 June 2008 13:07

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Jun 13, 12:44 pm, Brian Larsen <balar...@gmail.com> wrote:
> Oddly I opened up sign() and in the spirit of Coyote's IDL way I have
> previously written sign() without the nasty for loop. This rewrite
> gained a x12.6 improvement in speed for my test case.
>
> function sign, in
> pos = make_array(n_elements(in), /byte, value = 1)
> zero = in EQ 0
> neg = in LT 0
> pos = pos - zero
> pos = pos - 2 * neg
> return, pos
> END

Yup, that would definitely be better! You can probably age date when I
originally wrote each of those routines by the decreasing number of
FOR loops with time. ;-)

-Jeremy.

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[Message index]

		Re: JBIU utilities - release 1.0 By: David Fanning on Fri, 13 June 2008 13:58
		Re: JBIU utilities - release 1.0 By: Michael Galloy on Fri, 13 June 2008 13:54
		Re: JBIU utilities - release 1.0 By: Jeremy Bailin on Fri, 13 June 2008 13:07
		Re: JBIU utilities - release 1.0 By: Brian Larsen on Fri, 13 June 2008 13:03
		Re: JBIU utilities - release 1.0 By: David Fanning on Fri, 13 June 2008 11:45
		Re: JBIU utilities - release 1.0 By: Michael Galloy on Fri, 13 June 2008 11:39
		Re: JBIU utilities - release 1.0 By: Brian Larsen on Fri, 13 June 2008 09:44
		Re: JBIU utilities - release 1.0 By: MP on Sun, 15 June 2008 15:30

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