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Re: st: Concatenating two numerical variables with labels


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Concatenating two numerical variables with labels
Date   Mon, 6 Feb 2012 13:15:35 +0000

Note that Maarten's code corresponds exactly to what -egen, concat()
decode p(" ")- does on your behalf.

Nick

On Mon, Feb 6, 2012 at 1:11 PM, Maarten Buis <maartenlbuis@gmail.com> wrote:
> On Mon, Feb 6, 2012 at 1:56 PM, Tim Evans wrote:
>> I'm trying to generate a new string variable in Stata 11.2 which contains the concatenated result of two numeric variables which have labels. What I want is the name from the label of each variable rather than 1 1 for instance.
>
> You can create string variables containing the contents of the labels
> instead of the numbers using -decode-, after that you can "add" them
> as you would any string variable:
>
> *----------- begin example ------------
> sysuse auto, clear
> label define rep78 1 "Poor"    ///
>                   2 "Fair"    ///
>                   3 "Average" ///
>                   4 "Good"    ///
>                   5 "Excellent"
> label value rep78 rep78
>
> decode foreign, gen(str_for)
> decode rep78,   gen(str_rep)
>
> gen conc = str_for + "_" + str_rep
> drop str_for str_rep
>
> list foreign rep78 conc in 1/10
> *------------ end example -------------
> (For more on examples I sent to the Statalist see:
> http://www.maartenbuis.nl/example_faq )
>

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