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Re: "Expression Must be a Scalar in this context:" error in nlinlsq function [message #81233 is a reply to message #81221]

Tue, 28 August 2012 09:37

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

elambrid writes:

> Yes I agree, so I guess what I'm confused about is nlinlsq works like a for loop where the iterations are determined by the amounts of "functions", better word would be the size of you data set. So I have all these variables that look like this e.g a=[b(0)...b(n)] How would I check if one of those values are zero, and perform a statement on them? And thank you for your speedy reply!

If you want to check an individual element, you
have to check an individual element!

variable = [0, 1, 1, 0, 4]
FOR j=0,N_Elements(variable)-1 DO BEGIN
IF variable[j] EQ 0 THEN Print, 'variable ' + StrTrim(j,2) + $
' is equal to zero' ELSE Print, 'Good value'
ENDFOR

Cheers,

David

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

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[Message index]

		Re: "Expression Must be a Scalar in this context:" error in nlinlsq function By: Yngvar Larsen on Tue, 28 August 2012 23:23
		Re: "Expression Must be a Scalar in this context:" error in nlinlsq function By: David Fanning on Tue, 28 August 2012 09:37
		Re: "Expression Must be a Scalar in this context:" error in nlinlsq function By: Erini Lambrides on Tue, 28 August 2012 09:27
		Re: "Expression Must be a Scalar in this context:" error in nlinlsq function By: David Fanning on Tue, 28 August 2012 09:23

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