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Re: Quick array question [message #21686 is a reply to message #21679]

Wed, 13 September 2000 00:00

Liam E. Gumley
Messages: 378
Registered: January 2000

Senior Member

Ricardo Fonseca wrote:
> How does IDL store arrays in memory, does it use c style ordering or fortran
> style ordering?
>
> Here's my problem, I wrote a fortran program that writes a binary file to
> disk with an array (nx,ny,nz). Now when I read that file should I do
>
> data = fltarr(nx,ny,nz)
> readu, unit, data
>
> or should I do
>
> data = fltarr(nz,ny,nx)
> readu, unit, data
>
> and convert it later?

IDL uses FORTRAN-style ordering for arrays in memory. If you wrote the
array in FORTRAN with dimensions (nx, ny, nz), then read it in IDL with
dimensions (nx, ny, nz).

Cheers,
Liam.
http://cimss.ssec.wisc.edu/~gumley

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		Re: Quick array question By: Mark Hadfield on Wed, 13 September 2000 14:30
		Re: Quick array question By: Liam E. Gumley on Wed, 13 September 2000 00:00

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