From: Thomas Lumley <tlumley_at_u.washington.edu>

Date: Sat 16 Jul 2005 - 00:31:17 EST

> FIRST Q: The default uses the mean of 'vo' and mean of 'po', but what is it

*> using for the factors?? Is it the sum of the coef of the factors divided by
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*> the number of factors??
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 16 00:39:00 2005

Date: Sat 16 Jul 2005 - 00:31:17 EST

On Fri, 15 Jul 2005, Kylie-Anne Richards wrote:

>

> FIRST Q: The default uses the mean of 'vo' and mean of 'po', but what is it

It uses the mean of each factor variable. The $means component of the fit gives the values it uses.

> SECOND Q: For a model with covariates I would normally specify:

*> final.surv<-survfit((final), data.frame(po=0,vo=0,pom=0,individual=T)) to
**> get the baseline survival prob.; what would I specify for a model with a
**> factor, i.e., 'f.pom' ??
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f.pom=factor(-3, levels=seq(-3,2.5, by=0.5))

=thomas

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 16 00:39:00 2005

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