[R] Testing year effect in lm() ***failed first time, sending again
mark_difford at yahoo.co.uk
Wed Aug 5 18:52:26 CEST 2009
>> somewhat incomplete help pages : what in h*ll are valid arguments to
>> mcp() beyond "Tukey" ??? Curently, you'll have to dig in the source to
>> learn that...).
Not so: they are clearly stated in ?contrMat.
Emmanuel Charpentier-3 wrote:
> Le jeudi 30 juillet 2009 à 16:41 -0600, Mark Na a écrit :
>> Dear R-helpers,
>> I have a linear model with a year effect (year is coded as a factor),
>> the parameter estimates for each level of my year variable have
>> P values (see some output below) and I am interested in testing:
>> a) the overall effect of year;
>> b) the significance of each year vis-a-vis every other year (the model
>> output only tests each year against the baseline year).
> and use the vignettes ! They're good (and are a good complement to
> somewhat incomplete help pages : what in h*ll are valid arguments to
> mcp() beyond "Tukey" ??? Curently, you'll have to dig in the source to
> learn that...).
> Emmanuel Charpentier
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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