[R] one factor multiple level anova

[Lei Jiang]

I am having trouble figuring out this one.

I want to do a one way anvoa with 13 levels. mydata is in a vector with 
length 65. each level has 5 repeats. but it contains NA.

I made mygroup<-gl(13, 5, 65, labels=(...))

anova(lm(mydata ~ mygroup))

it gives following error:
Error in model.frame(formula, rownames, variables, varnames, extras, 
extranames,  :
         invalid variable type

Can you please help?? Millions of thanks.

Lei Jiang

Department of Chemsitry
University of Washington
Box 351700
Seattle, WA 98195
Phone: 206-616-6882
Fax: 206-685-8665