[R] how to read the "Sum Sq" - column from summary.aov()

[Bertolt Meyer]

Dear R-Users,

I have a trivial problem, but extensive googling and ??'ing did not solve it: I want to obtain the sums of squares from a summary.aov() object for later use. Example:

> DV <- rnorm(100)
> IV1 <- as.factor(rep(c("male", "female"), times = 50))
> IV2 <- as.factor(rep(c("young", "old"), times = 50))
> 
> summary(aov(DV ~ IV1 * IV2))

            Df Sum Sq Mean Sq F value Pr(>F)
IV1          1  0.215 0.21499  0.2277 0.6343
Residuals   98 92.523 0.94411               

How can I store the sums of squares in a variable for later use? Like this:

>some.magic.command()
[1]  0.215  92.523

Thank you,
Bertolt

-- 
Dr. Bertolt Meyer
Senior research and teaching associate
Social Psychology, Institute of Psychology, University of Zurich
Binzmuehlestrasse 14, Box 15
CH-8050 Zurich
Switzerland

bmeyer at sozpsy.uzh.ch