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Generates the plots described in https://stats.idre.ucla.edu/r/dae/ordinal-logistic-regression/ for checking if the proportional odds assumption holds for a cumulative logit model.
# S3 method for pomcheck plot(x, legend.position = "none", ...)
a pomcheck object
the position of legends ("none", "left", "right", "bottom", "top", or two-element numeric vector)
currently unused
None
pomcheck
# NOT RUN { plot(pomcheck(Species ~ Sepal.Width, iris)) # }
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