I am trying the following code-- from rpy import * r.library("ltm")
dat= #some data frame or matrix r.ltm(r('dat~z1')) error coming is--- RPy_RException: Error in eval(expr, envir, enclos) : object 'dat' not found Please tell me the right way to call ltm function using rpy library -- http://mail.python.org/mailman/listinfo/python-list