Re: st: Re: Changing Prefix of Variable Name

[Eric Booth <ebooth@ppri.tamu.edu>]

If Elisabeth really wants to change a prefix on the observations in a  
variable (not the variable name itself using -rensfix-), she can use - 
subinstr()- or -regexm()- for more complex substitutions, e.g.,

***
clear
input str10 var1
alpha
beta
delta
apple
arch
bean
aaaaaa
end

//change starting "a" only
gen pos = strpos(var1, "a")
replace var1 = subinstr(var1, "a", "1", 1) if pos==1
drop pos
*****

Eric



__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu
Office: +979.845.6754




On Nov 2, 2009, at 6:16 AM, E. Paul Wileyto wrote:

> Search Stata help:
>
> search rensfix, all
>
> It's a user-written command that is very useful for changing  
> prefixes and suffixes.
>
>
>
> Elisabeth Müller wrote:
> > Hello,
> >
> > does anybody know how to change the prefix of an observation (not  
> > variable)? E.g. if I want to change the observation "alpha" into  
> > "1lpha"?
> >
> > Thanks
>
> --
> E. Paul Wileyto, Ph.D.
> Assistant Professor of Biostatistics
> Tobacco Use Research Center
> School of Medicine, U. of Pennsylvania
> 3535 Market Street, Suite 4100
> Philadelphia, PA  19104-3309
>
> 215-746-7147
> Fax: 215-746-7140
> epw@mail.med.upenn.edu
> *
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*
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