comp.lang.idl-pvwave archive: archive » How to see if variable is defined?

Home » Public Forums » archive » How to see if variable is defined?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: How to see if variable is defined? [message #3499 is a reply to message #3435]

Thu, 26 January 1995 09:47

ps
Messages: 14
Registered: September 1994

Junior Member

Mike Schienle (rep2857@sbsun0010.sbrc.hac.com) wrote:
: IDL> print, var
: % PRINT: Variable is undefined: VAR.
: % Execution halted at $MAIN$ (PRINT).
: IDL> print, size(var)
: 0 0 1

: The first parameter will be a zero if var is undefined.

!!NO

that's wrong:
IDL> i=1
IDL> print,size(i)
0 2 1
IDL>

The *second* parameter has to be zero (exactly s(s(0)+1, which defines
the type of the variable)

Peter

------------------ Peter 'PIT' Suetterlin -----------------
| Kiepenheuer Institut | Sternfreunde Breisgau e.V |
| fuer Sonnenphysik | |
| 0761/3198-210 | 0761/71571 |
-<ps@kis.uni-freiburg.de>-<suettpet@sun1.ruf.uni-freiburg.de>--

Report message to a moderator

[Message index]

		How to see if variable is defined? By: rfinch on Fri, 20 January 1995 09:43
		Re: How to see if variable is defined? By: zawodny on Thu, 26 January 1995 12:28
		Re: How to see if variable is defined? By: nmw on Thu, 26 January 1995 03:18
		Re: How to see if variable is defined? By: thompson on Fri, 27 January 1995 06:49
		Re: How to see if variable is defined? By: rep2857 on Tue, 24 January 1995 08:22
		Re: How to see if variable is defined? By: ps on Thu, 26 January 1995 09:47
		Re: How to see if variable is defined? By: thompson on Mon, 23 January 1995 07:47

Previous Topic:	autostart Wave license, Solaris 2.4
Next Topic:	"True" map projections

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 19:32:17 PDT 2025

Total time taken to generate the page: 0.04948 seconds