| Re: help & help,/structure [message #72204 is a reply to message #72203] |
Fri, 13 August 2010 13:56   |
Michael Galloy
Messages: 1114
Registered: April 2006
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Senior Member |
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On 8/13/10 2:37 PM, Heinz Stege wrote:
> 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.
Yes, it seems like /STRUCTURES should only automatically kick in is if
the only variable passed to HELP is a structure *and* only has a single
element. IDL 8.0.1?
Mike
--
www.michaelgalloy.com
Research Mathematician
Tech-X Corporation
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