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Re: st: RE: generate


From   Mirriam Gee <mirrgee@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: generate
Date   Wed, 31 Mar 2010 10:33:21 +0200

Guess my question was not clearer enough. What i want in short is to
create  20 new variables which are equal to the first observation for
each variable
Obs                         CC1               CC2                CC3
............................................................CC20
 1                              333                440
 2                              333                440
 3                              333                440
 4                              605                777
 5                              605                777
 6                              605                777
 7
 ..
 ..

Now i want to cteate
Obs                           CCC1
1
2
3
4
5
6

O4n Wed, Mar 31, 2010 at 12:03 AM, Martin Weiss <martin.weiss1@gmx.de> wrote:

> " As a next step i now want to create a new variable which only uses
> mean of the lowest decile  for all variables e.g CCC`i'= mean of
> decile 1  for all observations."
>
>
>
> *******
> vers 9.2
>
> clear
> set obs 10000
>
> //recreating your dataset
> gen Dy= rchi2(2)
> xtile deciles = Dy, n(10)
> forv i=1/20{
>        gen C`i'=rnormal()
>        bys deciles: egen CC`i' =mean(C`i')
> }
>
> //Put first observation into new CCCs
> forv i=1/20{
>  gen CCC`i' =CC`i'[1]
> }
> *******
>
>
> HTH
> Martin
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Mirriam Gee
> Sent: Dienstag, 30. März 2010 23:16
> To: statalist@hsphsun2.harvard.edu
> Subject: st: generate
>
> Hallo everyone, I am new in stata. I am using STATA 9.2. I do have a
> very basic statement on how to generate a variable which is equal to
> the lowest 10th percentile of income(Dy) ?
> I tried this:
> sort Dy
> Xtile deciles = Dy, n(10)
> forvalues `i' = 1/20 {
> bys deciles : egen CC`i' =mean (C`i' )
> }
>  This seem to do part of the job. But it gives me mean of all deciles.
> For example CC1 varies from decile 1-10 as follows:
> Deciles                    CC1               CC2
> CC3..............................................
> 1                              333                440
> 1                              333                440
> 1                              333                440
> 2                              605                777
> 2                              605                777
> 2                              605                777
> 2
> ..
> ..
>
> As a next step i now want to create a new variable which only uses
> mean of the lowest decile  for all variables e.g CCC`i'= mean of
> decile 1  for all observations. To be more precise i want CCC1 to be
> equl to 333 for all observation, and CCC2 to be 440 etc I know i can
> do this manually by checking value of CC`i'  when decile=1 , and then
> proceed to input values:
>
>                                  generate CCC1 = 330
>
>
>                             generate CCC2=  440
>
>
>                                    .         .
>
>
>                                    .         .
>
>
>                               etc up to 20th item.
> I was just wondering if there is a way of doing it automatically in my
> do file without stoping and checking results and inputting them
> manually, because i do have a lot of variables, even more than 20?
>
>
> Mirriam
>
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