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# RE: st: Sums and means for each decile

 From Charles Vellutini To "statalist@hsphsun2.harvard.edu" Subject RE: st: Sums and means for each decile Date Thu, 11 Oct 2012 15:54:47 +0000

```So it does take a little bit of programming - but I agree that the use of -tabstat- with the -by()- option is very convenient.
Many thanks, it works perfectly!
Charles

-----Message d'origine-----
De : owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] De la part de Nick Cox
Envoyé : jeudi 11 octobre 2012 17:42
À : statalist@hsphsun2.harvard.edu
Objet : Re: st: Sums and means for each decile

This would be safer

gen decile = 10 if !missing(age)

On Thu, Oct 11, 2012 at 4:39 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> Here's one way to do it.  I find this more direct -- and more flexible
> -- than what the manual seems to imply you should do, but I could
> easily be missing something.
>
> webuse nlswork, clear
> _pctile age, p(10(10)90)
> ret li
> gen decile = 10
> qui forval i = 9(-1)1 {
>         replace decile = `i' if age < r(r`i') } tabstat age,
> by(decile) s(n sum mean)
>
>
> On Thu, Oct 11, 2012 at 4:24 PM, Charles Vellutini
> <charles.vellutini@ecopa.com> wrote:
>> Thanks Nick and sorry for the lack of clarity.
>>
>> -decile- does not exist, I meant -centile-, my mistake.
>>
>> What I want are sums and means of the same variable that was used to determine the percentiles -- but now that you mention it, it would nice to have that on other variables too!
>>
>> Thanks,
>> Charles
>>
>> -----Message d'origine-----
>> De : owner-statalist@hsphsun2.harvard.edu
>> [mailto:owner-statalist@hsphsun2.harvard.edu] De la part de Nick Cox
>> Envoyé : jeudi 11 octobre 2012 17:15 À :
>> statalist@hsphsun2.harvard.edu Objet : Re: st: Sums and means for
>> each decile
>>
>> What's -decile-?
>>
>> You're right about -pctile-. But what do you want?
>>
>> sums, means of some variable y in classes determined by selected percentiles of another variable x?
>>
>> sums, means of a variable x in classes determined by selected percentiles of the same variable x?
>>
>> On Thu, Oct 11, 2012 at 4:09 PM, Charles Vellutini <charles.vellutini@ecopa.com> wrote:
>>
>>> I have looked at -decile- and -pctile- but neither provides the sums and means of each decile/percentile (only the cutoffs), if I am not mistaken.
>>>
>>> One could of course recover the cutoffs from -decile- and program this by hand. There is also the excellent -glcurve- available from SSC but this produces graphs; it creates variables that, yes, could also be used to compute the sums I suppose.
>>>
>>> But I thought that someone surely programmed this already?
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