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: Data management: lowest value for which some condition is met
From
Guy Grossman <[email protected]>
To
[email protected]
Subject
Re: st: Data management: lowest value for which some condition is met
Date
Sat, 30 Oct 2010 23:04:14 -0400
wonderful. just what I needed. Thanks Eric!
This list is, as always, absolutely invaluable.
Guy
On Sat, Oct 30, 2010 at 10:49 PM, Eric Booth <[email protected]> wrote:
>
> <>
>
>
> *****************!
> clear
> inp group round x z Q
> 1 1 10 1 20
> 1 1 20 0 20
> 1 1 30 0 20
> 1 1 40 0 20
> 1 2 10 1 40
> 1 2 20 1 40
> 1 2 30 1 40
> 1 2 40 0 40
> 1 3 10 1 30
> 1 3 20 1 30
> 1 3 30 0 30
> 1 3 40 0 30
> 2 1 10 0 10
> 2 1 20 0 10
> 2 1 30 0 10
> 2 1 40 0 10
> 2 2 10 1 30
> 2 2 20 1 30
> 2 2 30 0 30
> 2 2 40 0 30
> 2 3 10 1 40
> 2 3 20 1 40
> 2 3 30 1 40
> 2 3 40 0 40
> end
>
>
> bys group round: egen q2 = min(x) if z==0
> bys group round: egen q = min(q2)
> li Q q
> *****************!
>
>
> - Eric
>
> __
> Eric A. Booth
> Public Policy Research Institute
> Texas A&M University
> [email protected]
> Office: +979.845.6754
> Fax: +979.845.0249
> http://ppri.tamu.edu
>
>
>
> On Oct 30, 2010, at 9:35 PM, Guy Grossman wrote:
>
> > Dear list members,
> >
> > I would appreciate your help in what seems like a non complicated
> > task, but unfortunately I am failing to find a simple solution. I have
> > a dataset such as the following: each group (1:G) plays a game for
> > several rounds (1:R), and each round has values of the variable x (10,
> > 20, 30, 40). Z is an indicator variable that can be 0 or 1. My goal
> > is to create a new variable Q, that measures for each group and round
> > the lowest value of x for which z==0. for example for group 1 in
> > round 1 20 is the lowest x for which z=0, so Q is assigned the value
> > 20 for all group==1 and round==1. In group 1 round 3, the lowest value
> > of x for which z=0 is 30, etc.
> >
> > I am hoping to get suggestions for a Stata code that can generate Q
> > efficiently, for a large dataset.
> > Many thanks!
> > Guy
> >
> > group round x z Q
> > 1 1 10 1 20
> > 1 1 20 0 20
> > 1 1 30 0 20
> > 1 1 40 0 20
> > 1 2 10 1 40
> > 1 2 20 1 40
> > 1 2 30 1 40
> > 1 2 40 0 40
> > 1 3 10 1 30
> > 1 3 20 1 30
> > 1 3 30 0 30
> > 1 3 40 0 30
> > 2 1 10 0 10
> > 2 1 20 0 10
> > 2 1 30 0 10
> > 2 1 40 0 10
> > 2 2 10 1 30
> > 2 2 20 1 30
> > 2 2 30 0 30
> > 2 2 40 0 30
> > 2 3 10 1 40
> > 2 3 20 1 40
> > 2 3 30 1 40
> > 2 3 40 0 40
> > *
> > * 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/
--
*
* 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/