[R] Hmisc / Design question

From: Greg Tarpinian <sasprog474_at_yahoo.com>
Date: Wed 03 Aug 2005 - 05:13:13 EST


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



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