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Re: Strange memory problem [message #18411 is a reply to message #18337]

Thu, 23 December 1999 00:00

rivers
Messages: 228
Registered: March 1991

Senior Member

In article <83rfkn$826$1@nnrp1.deja.com>, Peter Mason <menakkis@my-deja.com> writes:
> rkj@dukebar.crml.uab.edu (R. Kyle Justice) wrote:
> <...>
>> Actually I should have given my real problem rather than a
>> simplified version of it. Acutally I have two big arrays of
>> equal size and I am trying to copy one into the other:
>>
>> temp1(*)=temp2
> <...>
>
> The best way I know of to do this sort of thing (in IDL) is to use
> array-insertion starting offsets.
> e.g., If you have 2-dimensional arrays and you want to copy one on top
> of another, do: TEMP1(0,0)=TEMP2.
> This is much, *much* more efficient than using '*'. It also converts
> what it copies to the datatype of TEMP1 if necessary.
> This issue goes back a long way, so I'd expect the "solution" to work
> on PV-Wave as well.

This is definitely the best way to do this. Note that you don't need both
subscripts. You can just say:
a = bytarr(100,100,25)+10b ; Create array of all 10's
b = bytarr(100,100,25) ; Create a zero filled array
b(0) = a ; This copies a into b

Mark Rivers

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[Message index]

		Strange memory problem By: rkj on Tue, 21 December 1999 00:00
		Re: Strange memory problem By: Terry Smith on Thu, 23 December 1999 00:00
		Re: Strange memory problem By: rivers on Thu, 23 December 1999 00:00
		Re: Strange memory problem By: jeyadev on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: Mark D. Williams on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: m218003 on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: Peter Mason on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: thompson on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: Julie Greenwood on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: Alex Schuster on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: thompson on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: Julie Greenwood on Wed, 22 December 1999 00:00
		Re: Strange memory problem By: rkj on Wed, 22 December 1999 00:00

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