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Re: st: Smoothed Plot with Observation Specific CIs


From   Wassim Tarraf <tarrafwassim@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Smoothed Plot with Observation Specific CIs
Date   Thu, 15 Jul 2010 07:41:10 -0400

Thanks Maarten!

Maarten buis wrote:
--- On Thu, 15/7/10, Wassim Tarraf wrote:
I have a data set that includes point (probability)
estimates and their standard errors. Any recommendations on
the best way, in Stata, to smooth plot these point estimates
relative to a continuous X variable (say age) with CIs
(based on point specific SEs) about them?

Something like:

gen lb = pred - invnormal(0.975)*se
gen ub = pred + invnormal(0.975)*se

twoway rarea lb ub age, sort || ///
       line pred age, sort

This assumes that pred is your prediction, se is your standard
error and age is your X variable.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


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