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RE: st: How to extract text from Labels


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: How to extract text from Labels
Date   Wed, 6 Jun 2012 12:16:17 +0100

local first = strpos(`"`label"', "[") + 1

should be 

local first = strpos(`"`label'"', "[") + 1

        label var `v' `"`newlabel"'

should be 

        label var `v' `"`newlabel'"'

but I trust you spotted that. 

Nick 
n.j.cox@durham.ac.uk 


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: 05 June 2012 18:00
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: How to extract text from Labels

Almost daily, or so it seems, there are questions to which the answers
are: use extended macro functions! use string functions! Here is
another.

Code something like this:

foreach v of varlist <yourlist> {
        local label : var label `v'
        local first = strpos(`"`label"', "[") + 1
        local second = strpos(`"`label'"', "]")
        local newlabel = substr(`"`label'"', `first', `second' - `first')
        label var `v' `"`newlabel"'
}

Or a regular expression approach

foreach v of varlist <yourlist> {
        local label : var label `v'
        if regexm(`"`label'"'", "\[(.*)\]") {
                local newlabel = regexs(1)
         }
         label var `v' `"`newlabel"'
}

-save- the dataset first before you experiment.

On Tue, Jun 5, 2012 at 4:50 PM, Jörg Eulenberger <j.eulenberger@web.de> wrote:

> I have a problem with labels.
>
> In my Dataset are single items (binary) from a multiple option question.
> The label format of this variables are "[Text1]Text2". Now I want to
> relabel the variables only with the Text in the square brackets (Text1).
>
> Any ideas for a syntax that i can use in a foreach-loop?

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