comp.lang.idl-pvwave archive: archive » Re: indexing over structure tags

Home » Public Forums » archive » Re: indexing over structure tags

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: indexing over structure tags [message #24811 is a reply to message #24809]

Thu, 19 April 2001 10:16

tam
Messages: 48
Registered: February 2000

Member

Just use the numeric tag syntax for structures.

for i=0,n_tags(data)-1 do begin
data.(i).values = .. some expresion ...
endfor

where the (i) indicates use the i'th element of the structure.
So you don't need to use the names at all.

Regards,
Tom McGlynn

Randall Skelton wrote:
>
> Hello,
>
> Imagine someone has a structure of structures...
>
> ; define the basic structure for each
> sm_struc = {basic_struct, comment: ' ', values: fltarr(nlev)}
>
> ; define the large structure
> data = {big_struct, so4: sm_struc, co2: sm_struc, hcl: sm_struc}
>
> The IDL manual describes how to make an array of the tags in a structure
> using:
>
> ; get the names of the tags
> names = tag_names(data)
>
> so that names = [so4, co2, hcl].
>
> That is all fine. But is it possible to index over the tag names with a
> for-loop?
>
> i.e. for i=0, n_elements(names)-1 do data.names[i].values = i
> ^^^^^^^^^^^^^^^^^^^^
>
> where IDL determines what the appropriate label 'data.name[i].values' is.
>
> Thanks,
> Randall

Report message to a moderator

[Message index]

		Re: indexing over structure tags By: tam on Thu, 19 April 2001 12:23
		Re: indexing over structure tags By: tam on Thu, 19 April 2001 12:25
		Re: indexing over structure tags By: Paul van Delst on Thu, 19 April 2001 11:08
		Re: indexing over structure tags By: Vapuser on Thu, 19 April 2001 10:36
		Re: indexing over structure tags By: Bernard Puc on Thu, 19 April 2001 10:50
		Re: indexing over structure tags By: tam on Thu, 19 April 2001 10:16
		Re: indexing over structure tags By: Randall Skelton on Thu, 19 April 2001 10:24
		Re: indexing over structure tags By: R.Bauer on Tue, 24 April 2001 00:45
		Re: indexing over structure tags By: Paul van Delst on Thu, 19 April 2001 10:05
		Re: indexing over structure tags By: Paul van Delst on Thu, 19 April 2001 10:00

Previous Topic:	Re: fastest operations/fctns.
Next Topic:	MBAR

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 14:56:13 PDT 2025

Total time taken to generate the page: 0.00730 seconds