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Re: [Q] readf into an array error [message #5729 is a reply to message #5725]

Fri, 02 February 1996 00:00

Ken Knighton
Messages: 44
Registered: May 1995

Member

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

I'm not sure why IDL gives you an error, but

readf, unit,a(i)

is not going to read anything. a(i) is an expression rather than a
variable. The readf statement requires a named variable in order to
read anything. Try using

a=fltarr(10)
i=0
b=0.0
readf, unit, b
a(i)=b

This is actually mentioned somewhere in the i/o chapter of the user's
manual.

Also, you might want to look at the ASSOC() function and associated i/o.
Because you are reading an array, this might be a better solution.

Ken Knighton knighton@gav.gat.com knighton@cts.com
General Atomics
San Diego, CA

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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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