Returns a summary function which is constant with value equal to the number of points in the point pattern.
npfun(X, ..., r)Point pattern.
Ignored.
Vector of values of the distance argument \(r\).
Object of class "fv" representing a constant function.
This function is normally not called by the user. Instead it is passed
as an argument to the function psst.
# NOT RUN {
fit0 <- ppm(cells, ~1, nd=10)
v <- psst(fit0, npfun)
# }