On 2011-04-15 14:36, Dorien Herremans wrote:
Hi,
Thank you for your suggestion.
I am stil quite new to the syntax of R. I tried in a few ways but all
produced errors:
You might find working through "An Introduction to R"
enlightening. It's certain to be a more efficient
method than a guess-and-hope approach to modeling
syntax.
fit<- lm((tos~nh1*nh2*nh3*randsize*aweights*tt1*tt2*tt3*iters*length,
data=expdata))
Why do you have the extra parentheses? They cause lm()
to think that _everything_ inside the inner parens is
the 'formula' argument to lm(), including the ", data=..."
part.
Error: unexpected ',' in "fit<-
lm((tos~nh1*nh2*nh3*randsize*aweights*tt1*tt2*tt3*iters*length,"
fit<- lm(tos~nh1*nh2*nh3*randsize*aweights*tt1*tt2*tt3*iters*length)
Error in eval(expr, envir, enclos) : object 'tos' not found
Well, now you've left off the 'data=' argument and R can't
find 'tos'. Isn't the message pretty clear?
summary.lm(tos~nh1*nh2*nh3*randsize*aweights*tt1*tt2*tt3*iters*length)
Error in if (p == 0) { : argument is of length zero
Thanks for any additional insight...
Are you seriously contemplating up to 10-way interactions?
I hope that you have a great deal of data and much patience
as you attempt to interpret those interactions.
Peter Ehlers
Dorien
On 15 April 2011 18:07, Dieter Menne<dieter.me...@menne-biomed.de> wrote:
dorien wrote:
I calculate an anova test in the following way:
... aov example
I want to check the fit of the model with Rsquared
Try summary(lm(...)) instead.
Dieter
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