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Thu, 25 June 2015 08:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

g.nacarts@gmail.com writes:

> Something that I don't understand. I tried to avoid the for loop created before and I replace this part of the code:
>
> for i=0,n-1 do begin
> IF floats_equal(A[i],0) THEN RETURN,[0,0]
> endfor
>
> By this:
>
> IF norm(A) EQ 0 THEN RETURN, [0,0]
>
> I thought I will end up with the same result but I didn't. Does anyone know why this happen?

Most of the people who follow this newsgroup knows why it happens:

http://www.idlcoyote.com/math_tips/sky_is_falling.html
http://www.idlcoyote.com/math_tips/storenum.html
http://www.idlcoyote.com/math_tips/razoredge.html
http://www.idlcoyote.com/code_tips/lhsvsrhs.html
http://www.idlcoyote.com/math_tips/double.html

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

		HELP with IF statement By: g.nacarts on Thu, 25 June 2015 04:10
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:22
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 05:48
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:51
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 05:56
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:59
		Re: HELP with IF statement By: Paul Van Delst[1] on Thu, 25 June 2015 08:20
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 08:34
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:42
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:46
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:53
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:34
		Re: HELP with IF statement By: Paul Van Delst[1] on Thu, 25 June 2015 09:41

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