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Re: Error handling by build-in IDL routines [message #14661 is a reply to message #14658]

Mon, 15 March 1999 00:00

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Frank Holland wrote:

> Hi!
>
> I have a question about error handling by build-in IDL routines.
> Consider the following example:
>
> fritz = 'the cat'
> print, median(fritz)
>
> IDL replies with:
> % MEDIAN: Expression must be an array in this context: FRITZ.
> % Execution halted at: $MAIN$
>
> My question:
> How does the function MEDIAN knows the name of the parameter (i.e.
> FRITZ) I passed into it? How can I implement this functionality into my
> own IDL routines?
>
> Thanks for any suggestions,
>
> Frank

Try this!

PRO t2,test

HELP,/recall,output=output
for_test=(STR_SEP(output[1],','))[1]
varsize=SIZE(routine_names(for_test,fetch=-1),/type)
VarValue = Routine_Names(for_test, FETCH=-1 )

IF test EQ varvalue THEN IF varsize NE 4 THEN $
MESSAGE,'Expression must be of type FLOAT:'+for_test,/info

END

dd='dummy'
t2,dummy

R.Bauer

Hallo Frank,

ich denke gerade ï¿½ber eine allgemeinere Funktion nach.
Die Idee von heute morgen war eigentlich schon fast richtig. Ich habe nur
nicht an
den recall buffer gedacht.

R.

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[Message index]

		Re: Error handling by build-in IDL routines By: Vapuser on Tue, 16 March 1999 00:00
		Re: Error handling by build-in IDL routines By: R.Bauer on Mon, 15 March 1999 00:00
		Re: Error handling by build-in IDL routines By: R.Bauer on Mon, 15 March 1999 00:00

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