. 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 <[email protected]> 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
>
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
