Re: [R] Struggling to compute marginal effects !

2018-03-19 Thread Willy Byamungu
ethod = "logistic" ) > > works, the problem may be with the "Adopt" variable. > > Jim > > > On Tue, Mar 20, 2018 at 10:55 AM, Willy Byamungu > wrote: > > Sorry, do not read "Inc_reliable_fromNTA" I did a mistake in the email I >

[R] Struggling to compute marginal effects !

2018-03-19 Thread Willy Byamungu
Dear Oscar, and any other R-project person, Can you please help me to figure out the meaning of the following error message in red ? Error in eval(predvars, data, env) : numeric 'envir' arg not of length one I computed ordered logit models using 'polr' in R (I just followed the guidance a hand