[R-meta] Removing intercept for all categorical variables in a single model

[John Mahas]

Hi All,

I am using the rma.mv function in R for a meta-analysis project where I have multiple categorical moderator variables. I am trying to get the intercept removed from these moderators, but it is only removing the intercept from the first moderator listed in the code (see example below).

results=rma.mv(yi,vi,mods=~a-1+b-1+c-1,data=datum)

If I ran the example here, it would remove the intercept for "a" but not "b" and "c". Is there a way I can remove the intercept for the other moderators as well? If so, how?

Thanks,

John Mahas


_________________________

John W. Mahas

Graduate Research Assistant

Auburn University

Department of Entomology and Plant Pathology
301 Funchess Hall

Auburn, AL 36849

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