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Re: [Q] readf into an array error [message #5734 is a reply to message #5725]

Fri, 02 February 1996 00:00

M.W.Gardner
Messages: 7
Registered: November 1995

Junior Member

Iarla Kilbane-Dawe <iarla@atm.ch.cam.ac.uk> wrote:

> why does IDL give me an error when I try to do?
>
> a=fltarr(10)
> i = 0
> readf,unit,a(i)
>

Iarla, what error do you get and what exactly are you attempting to do ?

if you haven't defined the unit you get "% READF: Variable is undefined: UNIT"

if unit is defined (eg given a number say 1) and has not been defined in an
open statement you get "% READF: File unit is not open: 1"

If you are trying to read from a file a ten element array then open you file,
read in the data, and close the file like so :

a=fltarr(10)
open,unit,'filename',/get_lun
read,unit,a
close,unit
free_lun,unit

and that should do it. If you don't want to do this then ignore all that and
let me know what you want to do !

Anyway, I hope that helps, if not provide some more info if I have missed the
point.

Matt
--
-----> Matt Gardner EMAIL->m.W.gardner@uea.ac.uk PHONE->+44- 1603-592041
School of Environmental Science,University of East Anglia,Norwich,NR4 7TJ,UK
------------------------------------------------------------ ------------------
opinions are mine - http://www.uea.ac.uk/~e449

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[Message index]

		[Q] readf into an array error By: Iarla Kilbane-Dawe on Fri, 02 February 1996 00:00
		Re: [Q] readf into an array error By: Ken Knighton on Fri, 02 February 1996 00:00
		Re: [Q] readf into an array error By: peter on Fri, 02 February 1996 00:00
		Re: [Q] readf into an array error By: M.W.Gardner on Fri, 02 February 1996 00:00

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