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Re: JBIU utilities - release 1.0 [message #60808 is a reply to message #60803]

Fri, 13 June 2008 09:44

Brian Larsen
Messages: 270
Registered: June 2006

Senior Member

Jeremy,

thanks for putting this on the web. I always like "borrowing" code
instead of rewriting it and there is some good stuff there.

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

Cheers,

Brian

------------------------------------------------------------ --------------
Brian Larsen
Boston University
Center for Space Physics
http://people.bu.edu/balarsen/Home/IDL

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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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