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Re: structure access using strings for tag-names [message #43428 is a reply to message #43427]

Mon, 11 April 2005 05:31

Paolo Grigis
Messages: 171
Registered: December 2003

Senior Member

Try this out:

;get list of tag names
tagnamelist=tag_names(!P)

;find which tag has the name "MULTI"
tagindex=where(tagnamelist EQ 'MULTI')

;access the structure
print,!p.(tagindex)

You can use struct.(0), struct.(1) etc. to access the values
in the first, second,... tag.

--Paolo

Thomas Pfaff wrote:
> Hello everyone,
>
> I would like to ask your opinion about the following.
>
> Using the function CREATE_STRUCT it is possible to create a struct with
> tag names defined by strings. This way it is possible to create structs
> without knowing their names at compile time.
>
> However even if I don't have to know the tag names when creating a
> struct, it seems that I still have to know them, when I want to acccess
> the data within that struct, because I couldn't find any procedure or
> function for this purpose and struct.'tag_name' quite naturally gives a
> syntax error.
>
> Any ideas why this isn't implemented, or why it isn't necessary to have
> it (would be nice to set up simple associative containers, wouldn't it)?
>
> Best regards,
>
>
> Thomas

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[Message index]

		structure access using strings for tag-names By: Thomas Pfaff on Mon, 11 April 2005 05:08
		Re: structure access using strings for tag-names By: Paolo Grigis on Mon, 11 April 2005 05:31
		Re: structure access using strings for tag-names By: Antonio Santiago on Mon, 11 April 2005 05:15
		Re: structure access using strings for tag-names By: R.Bauer on Wed, 13 April 2005 02:29

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