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Re: A very simple FORMAT question [message #39079]

Sat, 24 April 2004 04:26

Christopher Lee
Messages: 4
Registered: February 2001

Junior Member

> Any explanation for these extra brackets? (for IDL, ifc, ...)
>
> Cheers,
>
> A.

The answer to this lies with our old friend Google....

http://www.hef.kun.nl/~pfk/teaching/fortran/ftn-AB.html

"The rule for rescanning formats is complicated by the presence of
brackets surrounding groups of format codes. The full rule for rescan is
as follows. If there are no nested brackets, rescan returns to the
beginning of the format. Otherwise, the rescan returns to the left bracket
which matches the right bracket nearest to the closing bracket of the
format. If this left bracket is preceded by a repeat count, this count
takes effect during the rescan."

so...

print, findgen(6),format='(i," A",i," B",i," C")'
0 A 1 B 2 C
3 A 4 B 5 C

print, findgen(6),format='(i," A",(i," B"),i," C")'
0 A 1 B 2 C
3 B 4 C
5 B

If you want the read to include the terms before the first _real_
brackets in a repeat, you need an extra set of opening brackets.

Chris.

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[Message index]

		Re: A very simple FORMAT question By: Christopher Lee on Sat, 24 April 2004 04:26
		Re: A very simple FORMAT question By: Andry William (Please on Fri, 23 April 2004 11:38
		Re: A very simple FORMAT question By: Andry William (Please on Fri, 23 April 2004 11:35
		Re: A very simple FORMAT question By: Chris Lee on Fri, 23 April 2004 04:18
		Re: A very simple FORMAT question By: Chris Lee on Thu, 22 April 2004 02:06
		Re: A very simple FORMAT question By: wmconnolley on Thu, 22 April 2004 01:20
		Re: A very simple FORMAT question By: Andry William (Please on Wed, 21 April 2004 17:29
		Re: A very simple FORMAT question By: Andry William (Please on Wed, 21 April 2004 17:35
		Re: A very simple FORMAT question By: wmconnolley on Wed, 21 April 2004 12:38
		Re: A very simple FORMAT question By: David Fanning on Wed, 21 April 2004 12:31

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