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Re: IDL FOR Loop variable increments [message #62600 is a reply to message #62599]

Fri, 19 September 2008 07:26

pgrigis
Messages: 436
Registered: September 2007

Senior Member

It's nice sometimes to see an IDL error message I've never seen
before!

For the record:
IDL> FOR i =0,10 DO i=long(i)
% Type of FOR statement index variable I may not be changed.
% Execution halted at: $MAIN$ 1 /tmp/idltemp45235Sz

Ciao,
Paolo

David Fanning wrote:
> Carsten Lechte writes:
>
>> Maybe the program tried to change the type of the variable?
>> That would generate an error.
>
> Yes, that was the error. I was using a less-than operator
> to compare the loop variable (an integer) with a structure
> variable, which was a long. This had the effect of changing
> the type of the loop variable.
>
> Thanks for the hint.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: IDL FOR Loop variable increments By: raghuram on Mon, 22 September 2008 08:54
		Re: IDL FOR Loop variable increments By: raghuram on Sun, 21 September 2008 15:37
		Re: IDL FOR Loop variable increments By: Wasit.Weather on Sun, 21 September 2008 06:44
		Re: IDL FOR Loop variable increments By: raghuram on Fri, 19 September 2008 22:51
		Re: IDL FOR Loop variable increments By: pgrigis on Fri, 19 September 2008 12:09
		Re: IDL FOR Loop variable increments By: raghuram on Fri, 19 September 2008 12:07
		Re: IDL FOR Loop variable increments By: R.G. Stockwell on Fri, 19 September 2008 11:53
		Re: IDL FOR Loop variable increments By: MarioIncandenza on Fri, 19 September 2008 09:53
		Re: IDL FOR Loop variable increments By: pgrigis on Fri, 19 September 2008 07:26
		Re: IDL FOR Loop variable increments By: David Fanning on Fri, 19 September 2008 06:13
		Re: IDL FOR Loop variable increments By: Carsten Lechte on Fri, 19 September 2008 01:09
		Re: IDL FOR Loop variable increments By: Carsten Lechte on Fri, 19 September 2008 01:07
		Re: IDL FOR Loop variable increments By: raghuram on Thu, 18 September 2008 18:31
		Re: IDL FOR Loop variable increments By: David Fanning on Thu, 18 September 2008 15:46
		Re: IDL FOR Loop variable increments By: Jean H. on Thu, 18 September 2008 15:00
		Re: IDL FOR Loop variable increments By: Jean H. on Thu, 18 September 2008 14:52
		Re: IDL FOR Loop variable increments By: pgrigis on Thu, 18 September 2008 13:23
		Re: IDL FOR Loop variable increments By: David Fanning on Thu, 18 September 2008 13:03
		Re: IDL FOR Loop variable increments By: Jeremy Bailin on Tue, 23 September 2008 07:48

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