Re: st: Identify and Replace Values

[Jeph Herrin <stata@spandrel.net>]

how about

 levelsof traded_model, local(traded)
 levelsof new_model, local(new)
 local onlytraded : list traded - new
 local onlynew    : list new - traded
 local others     : list onlynew | onlytraded

 replace traded_model="others" if inlist(traded_model,"`others'")
 replace new_model   ="others" if inlist(new_model,"`others'")


hth,
Jeph

On 7/12/2010 12:18 PM, Hobst wrote:
> Hello
>
> I have a huge dataset containing automotive brand-swiching data. I have a
> variable called traded_model and another variable called new_model. in order
> to output a symmetric swiching matrix i need to identify all the expressions
> that are eigther only in traded_brand or only in new_brand and replace the
> expression with "others". For example a model called "318d" exists in
> traded_model but not in new_model, so all the "318d" should be replaced by
> "others".
>
> Does anyone have an idea how i can programm that? I dont get it to work, and
> doing it manually is close to impossible as there are more than 1000
> different model names.
>
> Any help is much appreciated, thank you.
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