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Re: Array indexing problem [message #37863 is a reply to message #37858]

Wed, 28 January 2004 14:28

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Michael Wallace wrote:
>
>>> Is there any existing code that will catch the below IDL simple
>>> example? Input a and b must be an array.
>>>
>>>
>>> Input is an array:
>>> IDL> b=[4]
>>> IDL> a=[0,1,2]
>>> IDL> print,a[b]
>>> 2
>>> This should give me an error.
>>
>>
>> Alas, you have run into a little known, but enormously
>> appreciated, little feature of IDL. (I'm sure it is
>> explained in the manuals somewhere. :-)
>
> Could you elaborate on the "enormously appreciated" part of your
> statement? Maybe I'm not thinking in the "IDL Way," but I would not
> have expected the result IDL gives. It may very well be explained in
> the manuals, but why is such a "feature" "enormously appreciated?"

After reading Liam's explanation, I would _still_ like elaboration on why this is
"enormously appreciated"! :o) Seems a bizarre feature to me..... but at least it's
documented.

paulv

--
Paul van Delst
CIMSS @ NOAA/NCEP/EMC

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[Message index]

		Re: Array indexing problem By: kashyap on Thu, 29 January 2004 15:21
		Re: Array indexing problem By: David Fanning on Thu, 29 January 2004 09:58
		Re: Array indexing problem By: Liam Gumley on Thu, 29 January 2004 09:43
		Re: Array indexing problem By: roberson_1 on Thu, 29 January 2004 09:03
		Re: Array indexing problem By: hunter on Wed, 28 January 2004 13:43
		Re: Array indexing problem By: Mark Hadfield on Wed, 28 January 2004 16:55
		Re: Array indexing problem By: David Fanning on Wed, 28 January 2004 14:40
		Re: Array indexing problem By: Paul Van Delst[1] on Wed, 28 January 2004 14:28
		Re: Array indexing problem By: Michael Wallace on Wed, 28 January 2004 14:23
		Re: Array indexing problem By: Liam Gumley on Wed, 28 January 2004 14:11
		Re: Array indexing problem By: David Fanning on Wed, 28 January 2004 13:34

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