[R] Extracting variables from random effects formulas

From: Rebecca Sela <rsela_at_stern.nyu.edu>
Date: Thu, 29 May 2008 00:24:38 -0400 (EDT)


I would like to be able to extract the names of the variables in a formula that specifies random effects. For example, given: random = ~ 1+year | st_name
I'd like to be able to get "year" and "st_name" out of random. Neither terms(random) nor random[2] seems to work. Is there a way to get variable names out?

Thanks in advance!

Rebecca



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