Thx for sticking with me on this. I still seem to be getting some errors.
I did following:
. upgraded to R 4.0 (had 3.6 before)
. ensured R upgrade worked in my R studio. Check.
. re installed the 3 packages you named (mlogi, subplot, effects) plus another that was required (prediction)
. Ran my regression model with mlogit with no errors re NAs or otherwise
So everything worked as it did previously so far …
Then I did the following:
- First, test a command from sjPlot package that integrates my mlogit results to make a simple html table of coefficients. This worked fine:
tab_model(ce.model.sim)
- Second, test a command from sjPlot package that integrates my mlogit results to plot coefficients. This worked fine:
plot_model(ce.model.sim, vline.color = "red", sort.est = TRUE)
- Third, test a command from sjPlot package that integrates my mlogit results to plot marginal effects of a regressor. Recieved an ERROR:
plot_model(ce.model.sim, type = "pred", terms = "SIZE")
Error in contrasts<-(*tmp*, value = contr.funs[1 + isOF[nn]]) :
contrasts can be applied only to factors with 2 or more levels
- Fourth, test a command from sjPlot package that integrates my mlogit results to plot an interaction effect (based on a diff model with IEs). Recieved an ERROR:
plot_model(ce.model11, type = "int")*
*Error in tmp[["fit"]] : subscript out of bounds
Help?