Plotting GCV values with respect to different nn-s and h-s parameters.

Refers to section 7.2.

Usage

plot_gcv(age, pos, tot, nn_seq, h_seq, kern = "tcub", deg = 2)

Arguments

age

the age vector.

pos

the pos vector.

tot

the tot vector.#'

nn_seq

Nearest neighbor sequence.

h_seq

Smoothing parameter sequence.

kern

Weight function, default = "tcub". Other choices are "rect", "trwt", "tria", "epan", "bisq" and "gauss". Choices may be restricted when derivatives are required; e.g. for confidence bands and some bandwidth selectors.

deg

Degree of polynomial to use. Default: 2.

Value

plot of gcv value

Examples

df <- mumps_uk_1986_1987
plot_gcv(
  df$age, df$pos, df$tot,
  nn_seq = seq(0.2, 0.8, by=0.1),
  h_seq = seq(5, 25, by=1)
)