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help & help,/structure [message #72208]

Fri, 13 August 2010 11:59

wlandsman
Messages: 743
Registered: June 2000

Senior Member

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

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[Message index]

		help & help,/structure By: wlandsman on Fri, 13 August 2010 11:59
		Re: help & help,/structure By: Anonymous on Wed, 06 April 2011 11:15
		Re: help & help,/structure By: penteado on Wed, 06 April 2011 07:52
		Re: help & help,/structure By: Mark Piper on Wed, 06 April 2011 07:24
		Re: help & help,/structure By: Foldy Lajos on Wed, 06 April 2011 01:40
		Re: help & help,/structure By: Anonymous on Tue, 05 April 2011 17:40
		Re: help & help,/structure By: penteado on Tue, 05 April 2011 17:31

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