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
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