Displays a plot of all predictions made through the iterative model computation as incorporated in the
input sentomodeliter object, as well as the corresponding true values.
# S3 method for sentomodeliter
plot(x, ...)a sentomodeliter object created using sento_model.
not used.
Returns a simple ggplot object, which can be added onto (or to alter its default elements) by using
the + operator.
See sento_model for an elaborate modelling example including the plotting of out-of-sample
performance.