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Re: Question/Bug on Transpose [message #26338 is a reply to message #26333]

Wed, 22 August 2001 16:06

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Joe Means <joe.means@orst.edu> writes:

> Hello IDL group,
> I have this problem transposing 3-D pointer arrays. Try this example:
>
> testptr = ptrarr(2,3,4)
> ccc = Transpose(testptr)
> ;This gives an error:
> % TRANSPOSE: Pointer expression not allowed in this context: TESTPTR.
>
> ;What I really want to do is:
> ccc = Transpose(testptr,[1,0,2]) ;But this gives the same error

This is truly annoying and I think it is a bug.

A simple workaround is to use a FOR loop and copy each plane of your
cube one at a time. It's not luxurious but it will work:

inptr = ptrarr(nx, ny, nz)
outptr = ptrarr(ny, nx, nz)
for i = 0, nx-1 do outptr(*,i,*) = inptr(i,*,*)

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Question/Bug on Transpose By: J�lio Maranh�o on Thu, 23 August 2001 00:36
		Re: Question/Bug on Transpose By: Craig Markwardt on Wed, 22 August 2001 16:06
		Re: Question/Bug on Transpose By: majewski on Mon, 27 August 2001 18:09

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