Message-ID: <20050802191313.2176.qmail@web32805.mail.mud.yahoo.com>
Date: 2005-08-02T19:13:13Z
From: Greg Tarpinian
Subject: Hmisc / Design question
All,
I have been reading Dr. Harrell's excellent
"Regression Modeling Strategies" book and trying out
the exercises. I understand that contrast( ) is used
to obtain contrasts between two variables for given
levels of other nuisance variables; is there a way
to use contrast( ) to obtain, for example, Scheffe
confidence intervals / hypothesis tests for many
post hoc contrasts at once?
Any help would be much appreciated,
Greg