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Re: BINARY FILES [message #22065 is a reply to message #21979]

Fri, 13 October 2000 00:00

Paul van Delst
Messages: 364
Registered: March 1997

Senior Member

mohamed_nur@my-deja.com wrote:
>
> hello all,
> I've been dealing with binary files and every case i had to know before
> hand the dimensions of the array to setup an IDL variable of the said
> dimesions and read the unformatted data into.
>
> But is it possible or is there a method (in IDL 5.2/5.3) to read it in
> with no knowledge of the dimensions of the array.
>
> thanks for the assistance

At last count (at least on my newsreader) we have two replies (Todd
Clements' second post doesn't count :o) and five.... well I don't know
what to call them. That a SNR of 0.4. Oof.

I have used both Todd Clements' suggestion, then graduated to Liam's
tools. I now work (almost) exclusively in netCDF so I avoid:

a) the problem with needing to know the file format/dimensions/etc,
b) the problems one encounters moving data files from big->little-endian
machines and
c) having to use IDL for everything (netCDF has an API in multiple
languages and the list is growing).

If you have the ability to create the files and aren't worried about
portability, I would suggest Liam's binary tools. If portability is a
problem, then (for a bit more effort) I'd say go with netCDF.

If you're stuck with someone else's files, then you're in the schtook.
It was only recently I discovered that Fortran sequential binary files
aren't as portable as I thought - endian-ness notwithstanding (Those
damn record delimiters!)

paulv
--
Paul van Delst Ph: (301) 763-8000 x7274
CIMSS @ NOAA/NCEP Fax: (301) 763-8545
Rm.202, 5200 Auth Rd. Email: pvandelst@ncep.noaa.gov
Camp Springs MD 20746

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[Message index]

		BINARY FILES By: mohamed_nur on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: Aaron Birenboim on Mon, 16 October 2000 00:00
		Re: BINARY FILES By: Aaron Birenboim on Mon, 16 October 2000 00:00
		Re: BINARY FILES By: Nick Bower on Sun, 15 October 2000 00:00
		Re: BINARY FILES By: mole6e23 on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: Paul van Delst on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: davidf on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: John-David T. Smith on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: mole6e23 on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: davidf on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: Liam E. Gumley on Fri, 13 October 2000 00:00
		Re: BINARY FILES By: Martin Schultz on Fri, 13 October 2000 00:00
		Re: binary files By: penteado on Wed, 09 March 2011 18:03

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