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Re: Read & write data files b/w IDL & Fortran 90 [message #39049 is a reply to message #39048]

Fri, 09 April 2004 13:37

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

Senior Member

bridgemat wrote:
> I did try the /f77_unformatted keyword when writing the original file,
> but I still couldn't get it to work. It shouldn't have anything to do
> w/ using Fortran 90 instead of 77, right? Or am I doing something
> altogether wrong in my Fortran program?

Hello,

I just grabbed both your codes and mucked about and had a "d'oh" episode.

You create the data in IDL using INDGEN == 2 byte ints. In your f90 code you read the data
with the default int which is 4 bytes. That's why you're getting the I/O error.

Two options:

1) In IDL create the data like so:
test=LINDGEN(3,4,5)
And read it with your current f90 code.

Or

2) Create the data file with your current IDL code and in Fortran90, define your integer
arrays like so:
INTEGER, PARAMETER :: ip = SELECTED_INT_KIND(4)
INTEGER(ip), DIMENSION(3,4,5)::arr_in,arr_out

The integer kind parameter from SELECTED_INT_KIND(4) should give you the kind type for a
2-byte integer.

I prefer option (1) coz it's the simplest, but YMMV.

cheers,

paulv

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[Message index]

		Re: Read & write data files b/w IDL & Fortran 90 By: Paul Van Delst[1] on Wed, 14 April 2004 13:56
		Re: Read & write data files b/w IDL & Fortran 90 By: bridgemat on Wed, 14 April 2004 13:45
		Re: Read & write data files b/w IDL & Fortran 90 By: Paul Van Delst[1] on Fri, 09 April 2004 13:44
		Re: Read & write data files b/w IDL & Fortran 90 By: Paul Van Delst[1] on Fri, 09 April 2004 13:37
		Re: Read & write data files b/w IDL & Fortran 90 By: bridgemat on Fri, 09 April 2004 13:20
		Re: Read & write data files b/w IDL & Fortran 90 By: bridgemat on Fri, 09 April 2004 12:35
		Re: Read & write data files b/w IDL & Fortran 90 By: Paul Van Delst[1] on Thu, 08 April 2004 14:45
		Re: Read & write data files b/w IDL & Fortran 90 By: wmconnolley on Thu, 08 April 2004 15:00

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