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# Re: st: which model do this commands refer to

 From Nick Cox To "statalist@hsphsun2.harvard.edu" Subject Re: st: which model do this commands refer to Date Tue, 30 Jul 2013 13:45:27 +0100

```Why not ask your friend?

There is no model here, just some calculations to show kernel density
and cumulative distribution plots after taking logarithms. -help
kdensity- and -help cumul- will explain more.
Nick
njcoxstata@gmail.com

On 30 July 2013 13:22, Walter Moturi <waltmoturi@gmail.com> wrote:
> hi statalisters!
> below are some commands a friend of mine referred me to in solving a
> querry i had on which dairy marketing channel was dominant among a set
> of channels. The dominace was based on the net returns. The model to
> which they belong to is still a puzzle although i got results. Please
> may some one help me
>
>  gen Vo1= ln( NET_RETURNS) if  OVR_allchannel==1
> (133 missing values generated)
>
> . gen Vo2= ln( NET_RETURNS) if OVR_allchannel==2
> (120 missing values generated)
>
> . gen Vo3= ln( NET_RETURNS) if  OVR_allchannel==3
> (175 missing values generated)
>
> . gen Vo4= ln(  NET_RETURNS) if  OVR_allchannel==4
> (189 missing values generated)
>
> . gen Vo5= ln( NET_RETURNS) if  OVR_allchannel==5
> (194 missing values generated)
>
> . sum  Vo1 Vo2 Vo3 Vo4 Vo5
>
>     Variable |       Obs        Mean    Std. Dev.       Min        Max
> -------------+--------------------------------------------------------
>          Vo1 |        63    10.05954    1.429657   6.063785   12.25534
>          Vo2 |        76    10.77753     1.36709   4.094345   14.25545
>          Vo3 |        21     10.9978    .8869691   8.594154   12.58225
>          Vo4 |         7    10.72201     .814208    9.81684   11.91405
>          Vo5 |         2    11.30802    .6630212   10.83919   11.77684
>
> . twoway (kdensity Vo1) (kdensity Vo2) (kdensity Vo3) (kdensity Vo4)
> (kdensity Vo5)
>
> . cumul Vo1, gen(cVo1)
>
> . cumul Vo2, gen(cVo2)
>
> . cumul Vo3, gen(cVo3)
>
> . cumul Vo4, gen(cVo4)
>
> . cumul Vo5, gen(cVo5)
>
> . stack cVo1 Vo1 cVo2 Vo2 cVo3 Vo3 cVo4 Vo4 cVo5 Vo5, into(c
> OVR_allchannel) wide clear
>
> . line  cVo1 cVo2 cVo3 cVo4 cVo5  OVR_allchannel, sort
> *
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*
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```