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Re: help & help,/structure [message #72205 is a reply to message #72204]

Fri, 13 August 2010 13:37

Heinz Stege
Messages: 189
Registered: January 2003

Senior Member

On Fri, 13 Aug 2010 11:59:58 -0700 (PDT), wlandsman wrote:

> A documented new feature of HELP,/STRUCTURE in IDL 8.0 has caused me
> a minor annoyance: According to the online help:
>
> "If a single argument is provided to HELP, and it is a structure,
> then HELP will automatically display the structure information without
> having to set the /STRUCTURE keyword."
>
> But I think this means that I can no longer use HELP to determine
> the number of elements in a structure array. In IDL 7.1 I could
> write
>
> IDL> print,!version
> { x86 linux unix linux 7.1.1 Aug 19 2009 32 64}
> IDL> help,tab
> TAB STRUCT = -> <Anonymous> Array[58]
>
> to determine that it has 58 elements. But in IDL 8.0, I get
> information about the structure but no information about the number of
> elements it contains... I have to print,N_Elements(tab) . --Wayne
>
> IDL> print,!version
> { x86 linux unix linux 8.0 Jun 18 2010 32 64}
>
> IDL> help,tab
> ** Structure <a065d74>, 21 tags, length=168, data length=162, refs=1:
> OBS_ID STRING '00031688021 '
> EXTNAME STRING 'uu297081092I '
> ASPCORR INT 0
> FILTER STRING 'U '
> TSTART DOUBLE 2.9708109e+08

I had that problem too, played a while arround, and found that
help,names='tab' is doing the trick.

Shorter, but a little bit uggly: help,tab,''

help,tab,structures=0 unexspectedly does not work ;-)

Would really be nice, to have the dimension information within the
header line of the help,tab output.

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[Message index]

		Re: help & help,/structure By: chris_torrence@NOSPAM on Fri, 13 August 2010 14:56
		Re: help & help,/structure By: Michael Galloy on Fri, 13 August 2010 13:56
		Re: help & help,/structure By: Heinz Stege on Fri, 13 August 2010 13:37
		Re: help & help,/structure By: Anonymous on Tue, 05 April 2011 17:14
		Re: help & help,/structure By: R.G.Stockwell on Thu, 14 April 2011 20:16

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