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Re: Most Common IDL Programming Errors [message #59759 is a reply to message #59757]

Tue, 08 April 2008 17:35

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

David Fanning wrote:
> Here are the three errors I most commonly see in IDL programs.
>
> 1. IDL programs are named incorrectly. The last program
> module in the file should have the same name as the file.
> Utility modules in the file should start with the name
> of the "command" (or last) module to make clear their
> purpose.
>
> 2. KEYWORD_SET is used to check whether a keyword is
> "used" or "defined". This function should only be
> used with binary keywords. (I plan to avoid all
> nuance with this list, and just go with black and
> white pronouncements.)
>
> 3. People draw graphics willy-nilly in widget programs
> without having the faintest idea which window their
> graphics might show up in.
>
> What would be on your list? Of course, typos are assumed. :-)

Here are a few (in no particular order, despite the numbers):

1. Thinking you are using a color table in direct graphics, but are
actually using decomposed color (shades of red problem).

2. Not setting up color in PS output correctly.

3. Confusion with direct graphics output in landscape mode in PS.

4. Not scaling object graphics into a coordinate system correctly.

Mike
--
www.michaelgalloy.com
Tech-X Corporation
Software Developer II

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[Message index]

		Re: Most Common IDL Programming Errors By: David Klassen on Wed, 09 April 2008 11:05
		Re: Most Common IDL Programming Errors By: brodzik@nsidc.org on Wed, 09 April 2008 10:11
		Re: Most Common IDL Programming Errors By: Vince Hradil on Wed, 09 April 2008 09:39
		Re: Most Common IDL Programming Errors By: rigby on Wed, 09 April 2008 08:26
		Re: Most Common IDL Programming Errors By: ben.bighair on Wed, 09 April 2008 07:22
		Re: Most Common IDL Programming Errors By: liamgumley on Wed, 09 April 2008 07:07
		Re: Most Common IDL Programming Errors By: David Fanning on Wed, 09 April 2008 06:12
		Re: Most Common IDL Programming Errors By: Kenneth P. Bowman on Tue, 08 April 2008 19:54
		Re: Most Common IDL Programming Errors By: Kenneth P. Bowman on Tue, 08 April 2008 19:48
		Re: Most Common IDL Programming Errors By: Maarten[1] on Wed, 09 April 2008 01:01
		Re: Most Common IDL Programming Errors By: Spon on Wed, 09 April 2008 00:06
		Re: Most Common IDL Programming Errors By: David Fanning on Tue, 08 April 2008 19:27
		Re: Most Common IDL Programming Errors By: David Fanning on Tue, 08 April 2008 19:27
		Re: Most Common IDL Programming Errors By: Andrew Cool on Tue, 08 April 2008 19:06
		Re: Most Common IDL Programming Errors By: Peter Mason on Tue, 08 April 2008 18:31
		Re: Most Common IDL Programming Errors By: Vince Hradil on Tue, 08 April 2008 17:40
		Re: Most Common IDL Programming Errors By: Michael Galloy on Tue, 08 April 2008 17:35
		Re: Most Common IDL Programming Errors By: Vince Hradil on Tue, 08 April 2008 17:27
		Re: Most Common IDL Programming Errors By: Carsten Lechte on Thu, 10 April 2008 02:22
		Re: Most Common IDL Programming Errors By: MarioIncandenza on Wed, 09 April 2008 11:34
		Re: Most Common IDL Programming Errors By: mmiller3 on Thu, 10 April 2008 06:23
		Re: Most Common IDL Programming Errors By: Andrew Cool on Wed, 09 April 2008 19:56
		Re: Most Common IDL Programming Errors By: Kenneth P. Bowman on Wed, 09 April 2008 09:31
		Re: Most Common IDL Programming Errors By: bjelley on Wed, 09 April 2008 11:05

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