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RE: st: forvalues and _N


From   "Wallace, John" <John_Wallace@affymetrix.com>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: forvalues and _N
Date   Fri, 3 Sep 2004 10:23:06 -0700

Thanks for the reference Nick.  It does look like the same problem.  I was
surprised to think that I was the first one to come across this and was
thinking I might have a candidate for my first public .ado contribution
(after considerable revision to make it more general). Pity.

-JW

-----Original Message-----
From: Nick Cox [mailto:n.j.cox@durham.ac.uk] 
Sent: Friday, September 03, 2004 9:39 AM
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: forvalues and _N

This looks like the problem tackled already by 
Roger Newson's -sencode- (SSC) and my -oencode- 
(private domain). Last time I looked, Roger's 
could do things mine couldn't do, and versa vice, 
so I guess I should make mine public too. 

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

Wallace, John
 
> Thanks for the explanation, Nick. What I was seeking to do 
> isn't all that
> different from how -encode- works, but I wanted to be in 
> specific control of
> the association between the numeric variable and the 
> alphanumeric label.  I
> believe -encode- generates its new numeric variable in 
> ascending alphabetic
> order of the encoded string values.  The order the string 
> values had in my
> original data set was structure I needed to retain, which I 
> did using the
> following:
> 
> . insheet using [tab-delimited text file]
> . keep v1 descriptions
> . gen pset = _n /*to record the initial order of observations*/
> . move pset  v1
> . rename v1 probesetname /*the string data comes in with the 
> v1 generic
> variable name*/
> . forval e = 1 /`=_N'{ /*thanks to Fred Wolfe*/
> 	.local pval = probesetname[`e']
> 	.label define psetlab `e' "`pval'", add
> .}
> .label values pset psetlab /*the desired association*/
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