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Re: delete a tagname from a structure? [message #86002 is a reply to message #9715]

Mon, 23 September 2013 14:55

spluque
Messages: 33
Registered: September 2013

Member

Hi,

Searching for a way to remove a field from a structure, I found this advice from 1997. Is there a better way to do this nowadays, in the most general way suggested by JD Smith below?

Thanks,
Seb

On Friday, August 8, 1997 2:00:00 AM UTC-5, J.D. Smith wrote:
> R. Bauer wrote:
>>
>> Hi,
>>
>> I like to remove a tagname from a structure.
>>
>> Any ideas?
>>
>> --
>> R.Bauer
>>
>> Institut fuer Stratosphaerische Chemie (ICG-1)
>> Forschungszentrum Juelich
>> email: R.Bauer@fz-juelich.de
>
>
> st={tag1:1,tag2:2,tag3:3,tag4:4} ; a structure
> tags=tag_names(st)
> list=[0,1,3] ;; list of which elements to keep
> st=create_struct(tags[list],st.(list[0]),st.(list[1]),st.(li st[2]))
>
>
> If you have a named struct, you can use
> name=tag_names(st,/STUCTURE_NAME) and create_struct(name=name,...)
>
> For a totally general method which doesn't preassume the number of tags
> to keep, you'd have to build an 'execute' statement.
>
> E.g.
>
> n=strtrim(n_elements(list),2)
> exc='st=create_struct(tags[list],'+string(FORMAT='('+n+'("st.(list[ ",I0,"])",:,","))',indgen(n_elements(list)))+')'
> out=execute(exc)
>
> JD

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[Message index]

		delete a tagname from a structure? By: R. Bauer on Fri, 08 August 1997 00:00
		Re: delete a tagname from a structure By: Alex Schuster on Thu, 21 August 1997 00:00
		Re: delete a tagname from a structure? By: spluque on Mon, 23 September 2013 14:55
		Re: delete a tagname from a structure? By: Fabzi on Tue, 24 September 2013 01:44
		Re: delete a tagname from a structure? By: ameigs on Wed, 25 September 2013 02:33
		Re: delete a tagname from a structure? By: spluque on Wed, 25 September 2013 07:45

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