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# RE: st: how to generate mean for a secquence of five year of a variable

 From Nick Cox To "'statalist@hsphsun2.harvard.edu'" Subject RE: st: how to generate mean for a secquence of five year of a variable Date Fri, 6 May 2011 12:11:07 +0100

```Have you thought about ignoring what you don't want or replacing it with missing?

Nick
n.j.cox@durham.ac.uk

prakash singh

Thanks Nick,
Your suggestion did work but it is giving me five observation in place
of one only.
i.e. it is filling first four observation point with the mean value in
stead of giving only one observation for var2 at cell number 5.

On 5/5/11, Nick Cox <njcoxstata@gmail.com> wrote:

> Here is one way to do it.
>
> bysort countryid (yearid) : gen order = _n
> by countryid : egen first5 = mean(var1) if order <= 5
> by countryid : replace order = _N - order + 1
> by countryid (yearid) : egen last5 = mean(var1) if order <= 5
> gen var2 = min(first5, last5)
>
> On Thu, May 5, 2011 at 6:36 PM, prakash singh <prakashbhu@gmail.com> wrote:
>> Thank Nick and Oliver for generating discussion which helped me coming
>> across the command lowess thanks a lot but what I mean (let me try
>> again to put my query in a better way) is: mean of only firs five
>> observation and then mean of last five obesrvation for each country.
>> the excercise is purely related to understanding the behaviour of the
>> variable at both ends not an ecoonmetric excercise.
>>

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```