Plots the hdensity_bivar object as output by the density function when evaluated on a hermite_estimator_bivar object.
# S3 method for hdensity_bivar
plot(x, main = "Hermite PDF", xlab = "X", ylab = "Y", ...)
A hdensity_bivar object.
A string, title for plot.
A string, x label for plot.
A string, y label for plot.
Unused.