search for: byamungu

Displaying 2 results from an estimated 2 matches for "byamungu".

2018 Mar 20
0
Struggling to compute marginal effects !
...rst model fails but not the second. I would start looking at "Data" to see what it contains. if: object2 <- polr(Inc ~ Training ,Data,Hess = T,method = "logistic" ) works, the problem may be with the "Adopt" variable. Jim On Tue, Mar 20, 2018 at 10:55 AM, Willy Byamungu <wmulimbi at email.uark.edu> wrote: > Sorry, do not read "Inc_reliable_fromNTA" I did a mistake in the email I > sent you. It should be just "Inc". > > The situation looks like this > > Data$Inc <- ordered(Data$Inc = > c("Not_reliable_at_all&qu...
2018 Mar 19
4
Struggling to compute marginal effects !
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 handout I found on princeton.edu about logit, probit and multinomial logit models) . The