Make a plot of substitution model results.
# S3 method for substitution
plot(x, to, ref, level, ...)A ggplot graph object showing the estimated difference in outcome when each pair of compositional variables are substituted for a specific time.
A substitution class object.
A character value or vector specifying the names of the compositional parts that were reallocated to in the model.
A character value of (("grandmean" or "clustermean" or "users"),
A character value of ("between", "within"), or "aggregate").
Further components to the plot, followed by a plus sign (+).