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Re: st: Issue with statsby


From   "Scott Merryman" <scott.merryman@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Issue with statsby
Date   Fri, 23 Nov 2007 16:08:32 -0600

. sysuse auto
(1978 Automobile Data)

. sum mpg

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
         mpg |        74     21.2973    5.785503         12         41

. return list

scalars:
                  r(N) =  74
              r(sum_w) =  74
               r(mean) =  21.2972972972973
                r(Var) =  33.47204738985561
                 r(sd) =  5.785503209735141
                r(min) =  12
                r(max) =  41
                r(sum) =  1576



The variance is return to r(Var) not r(var)

Scott


On Nov 23, 2007 4:03 PM, Nuno <liststata@gmail.com> wrote:
> Hi everyone,
>
> I have a file with over 5 million daily observations for a set of firms. The
> format is the following:
> id      date    var1
>
> I'm trying to produce a file that records the variance for each individual
> (id) using the following statsby command:
>
> statsby var=r(var), by(id) saving(c:\temp\var.dta, replace): sum var1
>
>
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