R help - Nov 2005 - Find main effect in 2-way ANOVA

Hi,

I use anova() to find interaction effect and then I need to find data with 
main effect from those data with interaction effect. How to do that?

I used : anova(lm(data~factor1*factor2)), then select data with interaction 
effect. Then I need to select those data also with main effect of factor1 
or factor2, from previous selected data. How to do that? Many thanks for 
your time on my quesiton!

Fay

Hi

It is not so clear to me what your intention is. Could you
provide a reproducible example to show what you want to do. 

Regards,

Christoph Buser

--------------------------------------------------------------
Christoph Buser <buser at stat.math.ethz.ch>
Seminar fuer Statistik, LEO C13
ETH (Federal Inst. Technology)	8092 Zurich	 SWITZERLAND
phone: x-41-44-632-4673		fax: 632-1228
http://stat.ethz.ch/~buser/
--------------------------------------------------------------


Gao Fay writes:
 > Hi,
 > 
 > I use anova() to find interaction effect and then I need to find data with
 > main effect from those data with interaction effect. How to do that?
 > 
 > I used : anova(lm(data~factor1*factor2)), then select data with
interaction
 > effect. Then I need to select those data also with main effect of factor1 
 > or factor2, from previous selected data. How to do that? Many thanks for 
 > your time on my quesiton!
 > 
 > Fay
 > 
 > ______________________________________________
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