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st: RE: Compute Modus accross variablesCompute Modus accross variables

From   Nick Cox <>
To   "''" <>
Subject   st: RE: Compute Modus accross variablesCompute Modus accross variables
Date   Mon, 6 Dec 2010 11:15:14 +0000

I don't know of code for another way to do it. 

I think the best way to do it without a -reshape- would be to write a Mata function. You'd need to handle ties in frequency with some recipe. 


Christian Hunkler

I am looking for a command / ado that allows to compute the mode accross 
variables, possibly also for strings.

E.g. if  I had these data:

id     var1      var2       var3
1     1991     1992     1991
2     1960     1961     1961
3     1920     1920     1921

I would like to compute a variable storing the mode across lines:
id     mode
1     1991
2     1961
3     1920

I know this can easily done by some simple reshaping using -egen mode 
by- collapsing and merging the data again, but we deal with pretty large 
datasets (reshaping takes minutes) and we have to do this for a couple 
of variables. And we have to do this for variables storing names (which 
is possible with -egen mode by-).

Maybe there is something available to do this, I haven't found yet?

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