Paul,
I am not sure how to do it in one step, but you could do the following:
xtile temp = var1, nq(100) /* creates new variable of integers with range
of 1 to 100 indicating percentiles */
gen new_var1=.
replace new_var1=1 if inrange(temp,1,12)
replace new_var1=2 if inrange(temp,13,34)
replace new_var1=3 if inrange(temp,35,72)
replace new_var1=4 if inrange(temp,73,100)
-Brent
______________________________________________________
Brent D. Fulton, PhD
Health Services Researcher
Petris Center, School of Public Health, UC Berkeley
Phone: 510-643-4102
Fax: 510-643-4281
Email: [email protected]
www.petris.org
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Visintainer, Paul
Sent: Tuesday, May 22, 2007 7:56 AM
To: [email protected]
Subject: st: working with percentile cutpoints
Is there a way to create a new variable that uses cutpoints based on unique
percentiles of distribution? For example, suppose I want a new variable
with 4 groups at (or as close as the distribution will allow) the following
percentile cutpoints: 13th percentile, 35th percentile, and the 73rd
percentile? I've looked at -xtile-, -pctile-, and -egen- and they don't
seem to allow for this option.
What am I missing?
Thanks for any help
Paul Visintainer
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