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Re: Reading unformatted data from exabyte tape [message #3982]

Wed, 12 April 1995 00:00

rivers
Messages: 228
Registered: March 1991

Senior Member

In article <3mesb5$7u9@post.gsfc.nasa.gov>, Dennis Lee Hlavka <sgdlh@virl.gsfc.nasa.gov> writes:
> I'm trying to find a way to read unformatted data from an exabyte tape
> using readu. The problem is the data is structured with a lonarr
> header of 50 words followed by a data array (fltarr of 6620 words).
> I can read each record successfully if I only read the header or
> the data alone (ie lonarr(6670) or fltarr(6670). I hope there is
> a way that I can read both in the same record in IDL. Any
> suggestions?

How about making a structure and reading that:

IDL> str = {header: lonarr(50), data: fltarr(6620)}
IDL> readu, lun, str

I just tried this (on a disk file) and it seems to work.
____________________________________________________________
Mark Rivers (312) 702-2279 (office)
CARS (312) 702-9951 (secretary)
Univ. of Chicago (312) 702-5454 (FAX)
5640 S. Ellis Ave. (708) 922-0499 (home)
Chicago, IL 60637 rivers@cars3.uchicago.edu (Internet)

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		Re: Reading unformatted data from exabyte tape By: rivers on Wed, 12 April 1995 00:00
		Re: Reading unformatted data from exabyte tape By: Fergus Gallagher on Wed, 12 April 1995 00:00

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