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Re: IDL out of range error [message #70157 is a reply to message #70154]

Mon, 15 March 2010 18:57

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Suguru Amakubo writes:

> Hi, I have an error that has been bugging me for 3 weeks that I am
> hoping you could shed some light on.
>
> I am currently trying to create a subset of an image from a bigger
> image and comparing it to another subset of the same dimention.
>
> When I run the program however I recieve an error:
>
> Subscript range values of the form low:high must be >= 0, < size, with
> low <= high:

Three weeks!? And you haven't learned yet how to put a breakpoint
in your program and have a look around?

This kind of error is a user error 100% of the time.
I've never known it to be anything else in 25 years
of IDL programming. You are making an assumption about
your data that isn't true. When the program crashes,
have a look around. Look at the size of the images
you are subscripting, print out the values you are
using as subscripts. Don't assume anything, your assumptions
are wrong. This is an easy error to spot if you check
*everything*. There is no need to wait three more weeks
to solve this. :-)

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 out of range error By: Suguru Amakubo on Tue, 16 March 2010 06:20
		Re: IDL out of range error By: David Fanning on Tue, 16 March 2010 06:13
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 06:12
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 06:11
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 06:08
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 06:07
		Re: IDL out of range error By: David Fanning on Tue, 16 March 2010 05:59
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 05:56
		Re: IDL out of range error By: David Fanning on Tue, 16 March 2010 05:41
		Re: IDL out of range error By: Suguru Amakubo on Tue, 16 March 2010 05:31
		Re: IDL out of range error By: David Fanning on Mon, 15 March 2010 18:57
		Re: IDL out of range error By: penteado on Mon, 15 March 2010 17:53

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