Try ``model = FALSE'' rather than ``model = F'' and see if it makes a
difference. You make have an unwanted variable named ``F'' lurking
somewhere.
(In general it is a *bad* idea to use ``F'' when ``FALSE'' is
intended.)
cheers,
Rolf Turn
Hi all,
I got an error message if I set model =F in polr(), like
> polr(y ~ x1 + x2, data1, model = F, method = "probit")
Error in model.frame(formula, rownames, variables, varnames, extras,
extranames, :
variable lengths differ (found for '(model)')
but
> polr(y ~ x1 + x2, data1, meth
