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Re: BINARY FILES [message #22046 is a reply to message #21979]

Mon, 16 October 2000 00:00

Aaron Birenboim
Messages: 24
Registered: October 2000

Junior Member

Todd Clements <mole6e23@hotmail.com> wrote:
: mohamed_nur@my-deja.com wrote:

:>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.

: I always use the fstat routine, which gets a bunch of information about
: the file, but the only one I ever use is the size field:

: ;-----
: openr,lun,'file.dat',/get_lun
: stat = fstat( lun )

: array = fltarr( stat.size )

: readu,lun,array

: free_lun, lun

After that, you can resize the array to the desired dimensions.
I do that frequently.

I have even used a correlation algorithm to determine
widths of image data that is not necessarily aligned!
Hopefully, your problem is not that tricky.
--
Aaron Birenboim
Albuquerque, NM
aaron@ptree.abq.nm.us
http://www.swcp.com/~aaron

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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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