Re: st: Dropping the largest and smallest 1% of observations

[Antoine Terracol <Antoine.Terracol@univ-paris1.fr>]

Hello,
use the results saved after -summarize, detail-

summarize varname, detail
drop if varname<r(p1) | varname>r(p99)


If you have many variables, use -tokenize-

tokenize "varname1 varname2 varname3 ..."
while "`1'"!="" {
		qui summarize `1', detail
		drop if `1'<r(p1) | `1'>r(p99)
		macro shift
		}

Hope this helps,
Antoine.
	

FUKUGAWA, Nobuya wrote:
> I want to cut off extraordinarily large and small values from variables
> used in regression analysis. 
> What is the easiest way to drop the largest and smallest 1% of observations
> from variables in STATA-7?
> Thanks in advance.




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