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st: RE: Help with varlist manipulation


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Help with varlist manipulation
Date   Mon, 20 Nov 2006 16:09:27 -0000

I have three comments: 

1. You need to tell us your criterion of "categorical". 

2. Your processing is better down upstream than downstream. 

3. I don't understand your terminology of string members. 

So, in essence, the algorithm should look like 

foreach v of var <varlist> { 
	if <`v' is categorical> { 
		local V `"`V' "`v' (categorical)""'  
	} 
	else local V `"`V' "`v'""'  
} 

and you should apply this before calling -xi:-. 

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

K Jensen
 
> I am writing an ado file to help with some modelling I'm doing. One of
> the input arguments is a varlist of the independent variables.
> 
> I am trying to produce additional "friendly" output to describe the
> model, particularly for variables produced using "xi" from categorical
> data. It is only me using it--so I know that I won't be making dummy
> variables differently--but other people will be looking at the output.
> 
> Using the auto data as an example say my varlist was:
> mpg _Irep78_2 _Irep78_3 _Irep78_4 _Irep78_5 length (method always
> involves a constant)
> 
> I would like to dereference the varlist to become just a list with
> string members and from it produce the list:
> "mpg" "rep78 (categorical)" "length"
> 
> I have tried looping through the varlist and trying various string
> functions on it but am getting nowhere.

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