[R] standard errors in summary.lm

From: Christoph Scherber <Christoph.Scherber_at_uni-jena.de>
Date: Tue 01 Nov 2005 - 22:32:20 EST

Dear R users,

If I have an aov object, how are the standard errors of the estimates in summary.lm calculated?

Using treatment contrasts, I would like to use the estimated differences in mean values ("intercepts") to calculate the mean values per factor level, and for these mean values I´f like to use the model output to calculate the standard errors.

Many thanks for your help!
Regards,
Christoph.

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