I get the same behavior as you do. The help file and the -if- construct at
the beginning of the code for grqreg.ado indicate that -sqreg- is permitted.
Changing the order of covariates does change the message for me, though, as
it is always the first independent variable that makes Stata choke...
***
sysuse auto, clear
sqreg price weight length , quantile(.25 .5 .75) reps(100)
grqreg
//changing order here...
sqreg price length weight , quantile(.25 .5 .75) reps(100)
grqreg
***
HTH
Martin
_______________
----- Original Message -----
From: "Carlo Amenta" <[email protected]>
To: <[email protected]>
Sent: Wednesday, June 03, 2009 1:59 PM
Subject: st: quantile regression graph
Dear statalisters,
I am trying to use STATA module grqreg, but I can't.
After a sqreg regression in which the first independent variable is X, the
program always gives me the following error message:
. grqreg, cons ci ols olsci
postfile: variable X already exists
r(110).
I have tried to change label to the variable X (or leave it without
label),
I have changed the order of regressors but nothing happened. Any idea on
the
problem?
*
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*
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* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
