sjPlot package to plot marginal effects from a regression by mlogit

scottcole2 · August 25, 2020, 7:40am

Thx i posted here:

mlogit regression: are index variables required? General

I’m using mlogit to estimate a regression model. Further, i’m using sjPlot to assess marginal effects and predicted probabilities from said model (according to package version 2.6.3 "sjPlot" explicitly supports "mlogit") I’ve run into a problem plotting/assessing MargEff/PredProb (via sjPlot). I keep getting this error: plot_model(ce.model, 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 Review of several forum posts (see below) suggests that this is likely related to NAs in dataset but, although there are “NAs” in the relevant variables in my regression model, there…