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st: RE: ST: creating new variables from a long list

From   "Martin Weiss" <>
To   <>
Subject   st: RE: ST: creating new variables from a long list
Date   Thu, 29 Oct 2009 21:08:50 +0100


The totals could be as easy as a -collapse-:

set obs 92
gen dataset=_n

expand 230
bys dataset: gen smsa=_n

gen crime=100+int(300*runiform())

collapse (sum) crime, /* 
 */ by(dataset)

which gives you an answer in -long- format (in -reshape- parlance), not wide
as you seem to request...


-----Original Message-----
[] On Behalf Of Eric Uslaner
Sent: Donnerstag, 29. Oktober 2009 20:47
Subject: st: ST: creating new variables from a long list


I have a data set of 92 sets of crime rankings by SMSA.  But whoever put
them together made a mess out of them (originally in Excel, but I have them
in Stata).  The data set consists of about 230 SMSAs (standard metropolitan
statistical areas) and their crime totals and ranks in 4 columns: data set
number, SMSA name, total, rank--92 times (one for each data set number) so I
have about 30,000+ entries. 

What I want to do is to create 92 * 2 variables so that the data set would
look like this:

SMSAname total1 rank1 total2 rank2...total92 rank92

ideally using SMSAname only once rather than 92 times.  Any suggestions as
to how to do this would be greatly appreciated.

Thanks much,


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