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: How to find the sum of a variable by a group id
From
Christophe Kolodziejczyk <[email protected]>
To
[email protected]
Subject
Re: st: How to find the sum of a variable by a group id
Date
Tue, 2 Aug 2011 18:09:11 +0200
write instead
collapse (sum) y1, by(hhid)
Christophe
2011/8/2 Urmi Bhattacharya <[email protected]>:
> Dear Statalisters,
>
> I have the following data set.
>
> hhid childid y1
> 1 1 1
> 1 2 1
> 1 3 0
> 2 1 0
> 2 2 0
>
>
> I need to find the sum of y1 per hhid, i.e., i need to get the
> following data set
>
> hhid sumy1
> 1 2
> 2 0
>
> How do I get that?
>
> I tried the following
>
> collapse (sum) y1, by hhid
> it gives me the following error:
>
> option by incorrectly specified
> r(198);
> I am using Stata 11.2.
>
> It is a simple enough thing I am sure, but I am just not able to work
> it out. It would be great if someone could tell me where am i going
> wrong?
>
> Best
>
> Urmi
> *
> * 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/
>
*
* 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/