Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: smart averaging
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
RE: st: smart averaging
Date
Thu, 23 Feb 2012 19:01:19 +0000
That can be done in various ways. Here is one:
bys id : egen OK = total(inrange(year,2006,2009) & income < .)
by id: egen average_inc = mean(income / (OK == 4))
Nick
[email protected]
Fernando Rios Avila
If you are trying to average it only for those without missing
variables, the easier process could be:
1. identify number of missing observations by id
2. average for all
3. replace by missing value if the number of missing values is higher than 0
On Wed, Feb 22, 2012 at 7:54 PM, Murat Mercan <[email protected]> wrote:
> I have the following problem I have been unable to decipher. I have the
> following data set:
> id year income
> 1 2006 100
> 1 2007 50
> 1 2008 .
> 1 2009 .
> 2 2006 50
> 2 2007 50
> 2 2008 50
> 2 2009 50
> I want to average the income variable for those four years. I tried to use
> the following command:
>
> bys id: egen average_inc = mean(income) if inrange( year,2006,2009)
>
> However, that averages person 1's income, too. I need to average just
> person 2's income.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/