Hi,

I meet some tecnhical problem when performing type III test in an 
analysis of covariance.
I code with contrast=sum and precise type="III" for the anova table.
There is a warning message like this:
Models with response "NULL" removed and type I is performed by default. 
And R-Help is not very clear on use of contrasts.

Please don't rush in the usual holy war about this topic. And if 
somebody as a concrete example...

Thank you

Alex

	[[alternative HTML version deleted]]


