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st: RE: Dummy Variable From a String


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Dummy Variable From a String
Date   Mon, 20 Nov 2006 18:07:32 -0000

You don't give a definition of the dummy variable 
you want. But 

tab myvar, gen(myvar) 

will generate a set of dummies regardless of 
whether -myvar- is string or numeric. 

And if -myvar- is string, 

gen is4c = myvar == "4c" 

is 1 or 0 depending on whether the equality on the RHS 
is true or false. And so on. 

Not only do you not want to -destring-, -destring- 
could at best map some of your values to missing,
so it is hard to see how it could be any use even
for any other purpose. 

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

Michael.D.Wilson@frb.gov
 
> I need to create a dummy variable from a string variable that 
> contains 
> both numbers and letters.  The string variable is a number sometimes 
> followed by the letter 'c'.  For example:
> 
> 1
> 2
> 3
> 4c
> 5c
> 6c
> 
> I need to create a dummy variable from this variable without 
> destringing 
> it.  Any ideas?

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