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Re: convert string into the name of a variable [message #28387 is a reply to message #28377]

Thu, 06 December 2001 06:05

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Frederic Raison wrote:
>
> Hi!
>
> Is there anybody who could tell me if there is an IDL instruction, like
> in Matlab, able to convert a string into the name of a variable and
> vice-versa? I mean if I have defined :
>
> a=1
> b=2
> list=['a','b']
>
> I would like to write:
>
> print,somme_instruction(list[0])
>
> and to get:
>
> 1
>
> Thank you
>
> Frederic

Dear Frederic,

as the two others wrote this could be done by execute.
But I like more to learn what's the idea to do this.
For what did you need this?

Another useful routine may be this one:
http://www.fz-juelich.de/icg/icg1/idl_icglib/idl_source/idl_ html/dbase/download/get_main_vars.tar.gz

or if you have a look in import_ascii you can see how it is done without
an execute

At the idl prompt type (This also will work in routines. But then you
have to use the level
keyword)

a=1
b=2
list=['a','b']

result=get_main_vars()
tn=strlowcase(tag_names(result))

;e.g.
ix=(where(tn eq list[0]))[0]

void = ROUTINE_NAMES(tn[ix], STORE=ROUTINE_NAMES(/LEVEL)-1, result.(ix))

I believe this would work in runtime but I am not sure.
The function execute will never work in runtime.

regards
Reimar

--
Reimar Bauer

Institut fuer Stratosphaerische Chemie (ICG-1)
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
http://www.fz-juelich.de/icg/icg1/
============================================================ ======
a IDL library at ForschungsZentrum Juelich
http://www.fz-juelich.de/icg/icg1/idl_icglib/idl_lib_intro.h tml

http://www.fz-juelich.de/zb/text/publikation/juel3786.html
============================================================ ======

read something about linux / windows
http://www.suse.de/de/news/hotnews/MS.html

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[Message index]

		Re: convert string into the name of a variable By: Pavel A. Romashkin on Thu, 06 December 2001 08:41
		Re: convert string into the name of a variable By: R.Bauer on Thu, 06 December 2001 06:05
		Re: convert string into the name of a variable By: thompson on Wed, 05 December 2001 15:31
		Re: convert string into the name of a variable By: Paul van Delst on Wed, 05 December 2001 14:47

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