comp.lang.idl-pvwave archive: archive » Re: "Expression Must be a Scalar in this context:" error in nlinlsq function

Home » Public Forums » archive » Re: "Expression Must be a Scalar in this context:" error in nlinlsq function

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

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

Tue, 28 August 2012 23:23

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

On Tuesday, 28 August 2012 18:27:51 UTC+2, elambrid wrote:
>> I would say that the variable aoffxc is a five-element byte array,
>
>>
>
>> when it should be a one-element scalar to use it in a boolean
>
>>
>
>> expression like this. :-)
>
>
>
>> David
>
>
>
> 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!

B = lonarr(42)
w = dblarr(42)
; ...
zero_ind = where(B eq 0, count)
if count gt 0 then w[zero_ind] = 0

Or simply this if you are going to do something if at least one element in B is zero:

if total(B eq 0) gt 0 then dostuff, B

--
Yngvar

Report message to a moderator

[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

Previous Topic:	Re: Format code to trim leading zeroes?
Next Topic:	Re: Inheriting Properties (or something similar) in IDLDOC

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:10:23 PDT 2025

Total time taken to generate the page: 0.00341 seconds