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checking if variable is defined
- Subject: checking if variable is defined
- From: "Dominik" <dpaul(at)ukl.uni-freiburg.de>
- Date: Wed, 11 Apr 2001 17:47:22 +0200
- Newsgroups: comp.lang.idl-pvwave
- Organization: Rechenzentrum der Universitaet Freiburg, Germany
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:24499
Helle there,
I would like to plot a variable, but only if it is existing. When the
Variable is undefined, nothing should happen. So I am searching for an
expression for the if statement. Does anybody know an expression like:
if ( vaiable_name existing) then...
Thanks
Dominik
--
_____________________________
Dominik Paul
dpaul@ukl.uni-freiburg.de
Universitätsklinikum Freiburg
Abt. PET/Nuklearmedizin