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Re: st: diving values of a column with other values of the same column


From   Scott Merryman <scott.merryman@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: diving values of a column with other values of the same column
Date   Tue, 5 Feb 2013 17:58:11 -0600

On Tue, Feb 5, 2013 at 3:34 PM, Tzaloupas Dimitrov
<tzaloupas1232@yahoo.gr> wrote:
> Dear all,
>
> I have the following excel file which I import into Stata
>  Country          overall         specific            dates                              values
> DD                         gg           0             01/11/2001                               5
> DD                         gg           0             01/12/2001                               2
> DD                         gg           0             01/01/2001                               3
>  DD                        gg           zz           01/11/2001                               15
> DD                         gg           zz           01/12/2001                               12
> DD                         gg           zz           01/01/2001                              13
> EE                          gg           0             01/11/2001                               0.5
> EE                          gg           0             01/12/2001                               0.2
> EE                          gg           0             01/01/2001                               0.3
> EE                          gg           zz           01/11/2001                               25
> EE                          gg           zz           01/12/2001                               122
> EE                          gg           zz           01/01/2001                              2 3
>
> For each country  separately(DD and EE) I would like to   divide the values that correspond to specific==zz by the values that correspond to speciffic==0
>
> For example, for DD I want to divide the vector  of values (15 12 13) that corresponds to specific==zz by the vector (5 2 3) that corresponds to specific==0; so as to construct a new vector of values=(15/5 12/2 13/3)


 bys country (spec dates) : gen values2 = values/values[_n-3]

Scott
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