numevalpts
Integer, giving number of equally-spaced points at which to compute density
estimate. Default 10,000.
pic.types
Character vector, naming the types of pictures produced. Default "1",
which produces a graph of the density with points in red circles.
normalize.to.1
The density should integrate to exactly 1, but sometimes the numeric
value is a little different from 1. If this is TRUE, the density's values
are scaled so that the integral is exactly 1.