Re: Multiple values from a function?

["J.D. Smith" <jdsmith(at)astro.cornell.edu>]

Craig Markwardt wrote:
> 
> "J.D. Smith" <jdsmith@astro.cornell.edu> writes:
> >
> > void=routine_names('a',STORE=-1,val)
> >
> > Lions and tigers and bears, oh my!
> 
> Pay no attention to the man behind the curtain!  I still say this
> doesn't work for most cases, at least under Unix.  The following is a
> simple transcript to test thes, which shows how ROUTINE_NAMES crashes
> when A is undefined, but works when A is defined.  In every case that
> I tried (as noted below), the variable A needs to be defined at the
> calling level *first* before ROUTINE_NAMES(STORE=) will work.
> 
> It could be that this works under v5.3, or on Windows.  I don't know
> since we don't have those versions around here.
> 
> Craig
> 
> IDL> .run
> pro testset, name
> void = routine_names(name,store=-1,findgen(10))
> end
> % Compiled module: TESTSET.
> 
> IDL> testset, 'a'   ;; A is undefined here, and it doesn't work
> % ROUTINE_NAMES: Variable is undefined: a.
> % Execution halted at:  TESTSET             2 /dev/tty
> %                       $MAIN$
> IDL> retall
> IDL> a = 1
> IDL> testset, 'a'   ;; Now A is defined and it works.
> IDL> help, a
> A               FLOAT     = Array[10]
> 
> IDL> print, !version
> { x86 linux unix 5.2.1 Jun  4 1999}
> { alpha OSF unix 5.2 Oct 30 1998}
> { x86 linux unix 5.1 Apr 13 1998}
> { alpha OSF unix 5.0 Apr 28 1997}
> { alpha OSF unix 4.0.1}

IDL> testset,'a'
IDL> print,a
      0.00000      1.00000      2.00000      3.00000      4.00000      5.00000
      6.00000      7.00000      8.00000      9.00000
IDL> print,!VERSION
{ x86 linux unix 5.3 Nov 11 1999}

You just need the new magic wand, version 5.3.

JD

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