Re: st: how to save the result of percentile using summarize

[Philipp Rehm <philipp.rehm@gmx.de>]

.
Your example syntax doesn't really work - and you display information 
from the helpfile that suggests so.

Consider this example:
sysuse auto, clear
su price,detail
di "** `r(p66)' **"
list if price>r(p66)

What you posted under "stata help copy" suggests that r(p66) is not 
defined (-sum, detail- returns r(p75) and r(p90), but no other 
percentile between these two). A quick way to find out would be:

sum price,detail
ereturn list

To access p66, you have several options, including the following two:

(1)
_pctile price, p(66)
ret li
di "*** `r(r1)' ***"

(2)
egen p66 = pctile(price), p(66)

Type "help pctile" for more info.

HTH,
Philipp



On 2/20/2010 10:22 PM, Nobuya Fukugawa wrote:
> statalisters,
> is it possible to save the result of percentile other than listed
> below (e.g. 66th percentile) using "summarize"?
> ------example-------
> su y,detail
> list if y>r(p66)
>
> ------stata help copy-------
> Saved results
>
>     summarize saves the following in r():
>
>     Scalars
>       r(N)           number of observations
>       r(mean)        mean
>       r(skewness)    skewness (detail only)
>       r(min)         minimum
>       r(max)         maximum
>       r(sum_w)       sum of the weights
>       r(p1)          1st percentile (detail only)
>       r(p5)          5th percentile (detail only)
>       r(p10)         10th percentile (detail only)
>       r(p25)         25th percentile (detail only)
>       r(p50)         50th percentile (detail only)
>       r(p75)         75th percentile (detail only)
>       r(p90)         90th percentile (detail only)
>       r(p95)         95th percentile (detail only)
>       r(p99)         99th percentile (detail only)
>       r(Var)         variance
>       r(kurtosis)    kurtosis (detail only)
>       r(sum)         sum of variable
>       r(sd)          standard deviation
>
> thank you in advance.
> *
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