[R] help with anova()
bwip at ucdavis.edu
Wed Dec 15 20:12:10 CET 2010
I'm trying to run an ANOVA in R and I have a problem:
I used this command: anova(lm(time~age*region*facility))
Age, region, and facility are all factor levels, which has 2, 4, and 3
however, in the output (anova table), it states that the df is 1 for all
three factors, which should be 1, 3, and 2 respectively.
Can anyone tell me if it is necessary to declare the factors as class before
it can run correctly? Or is there any other problem?
I attached the data set as shown below.
Thank you very much!
( http://r.789695.n4.nabble.com/file/n3089686/data1.csv data1.csv
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