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Re: Simple questions [message #2841 is a reply to message #809]

Mon, 26 September 1994 11:06

amaravad
Messages: 11
Registered: September 1994

Junior Member

In article <1994Sep23.213634.20939@mksol.dseg.ti.com> mcook@mksol.dseg.ti.com (mark k cook) writes:
> I have a couple of recurrent problems with IDL that I was
> hoping somebody could set me straight on. I seem to be
> getting into a situation where I'll ask for a calculation
> and the variable will be represented as an array instead
> of a scalar. This causes some of the IDL routines to die.
> I'm not sure where in the code this occurs at, but can't
> IDL just take the single element value as the scalar?
> A 1-dim vector should be treated as a scalar. Since
> there is no way I can figure out where something becomes
> a vector rather than a scalar in my operations, does this
> mean I have to write extra code to handle conversions?
> How do I know what or where to write it? This would be
> ludicrous, so I must be wrong somewhere.

if result is the name of the variable that you are expecting
to be returned as a scalar, but are finding that result is a
1-D array of length one instead, then just include
result=result(0)
at the end of your code. Result will be a scalar.

>
> The other recurrent problem is an out-of-space (memory)
> problem. How can I clear away any matrices I don't want
> around anymore to free up space?

Once you no longer need the matrix, just set matrix=0
This will automatically reset the matrix to a scalar
and release all additional space to the OS.
This will help you conserve memory.

>
> There are some things I like that IDL has over MATLAB
> (more than 2 D), but these two are no problem with MATLAB.
> It's gotta be my understanding of IDL.
>
> Thanks,
> Mark Cook
> mcook@lobby.ti.com

Hope this helps...

ratnakar amaravadi
ratty@foyt.indyrad.iupui.edu
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[Message index]

		simple questions: position and strings By: flatau on Sat, 15 May 1993 15:33
		Re: Simple questions By: landers on Tue, 27 September 1994 07:20
		Re: Simple questions By: amaravad on Mon, 26 September 1994 11:06
		Re: Simple questions By: rmm on Thu, 06 October 1994 08:37
		Re: Simple questions By: mcook on Sat, 24 September 1994 12:38
		Re: Simple questions By: thompson on Sat, 24 September 1994 09:56

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