comp.lang.idl-pvwave archive: archive » Re: Evaluate a string as a variable name

Home » Public Forums » archive » Re: Evaluate a string as a variable name

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

Re: Evaluate a string as a variable name [message #70809 is a reply to message #70723]

Tue, 04 May 2010 19:31

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On May 4, 10:48 am, laurel <laur...@gmail.com> wrote:
> Brilliant! Thanks so much.
> -Laurel

The IDL Astronomy library also has the very handy routine TAG_EXIST(),
which allows you to query structure members by name.

You would do something like this.
if tag_exist(struct, x, index=ii) then begin
y = struct.(ii)
endif else begin
message, "ERROR: could not find '"+x+"' in structure"
endelse

TAG_EXIST() appears to be completely stand-alone, i.e. no dependencies
on other functions in the library.
http://idlastro.gsfc.nasa.gov/ftp/pro/structure/tag_exist.pr o

Craig

Report message to a moderator

[Message index]

		Re: Evaluate a string as a variable name By: laurel on Tue, 04 May 2010 07:48
		Re: Evaluate a string as a variable name By: Michael Galloy on Mon, 03 May 2010 15:24
		Re: Evaluate a string as a variable name By: Craig Markwardt on Tue, 04 May 2010 19:31

Previous Topic:	problem with
Next Topic:	Creating a new image from an image input in IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 00:02:08 PDT 2025

Total time taken to generate the page: 0.01049 seconds