sitar (version 1.0.10)

dfset: Find degrees of freedom for a natural spline curve to minimise BIC or AIC

Description

dfset fits a natural cubic spline for a range of degrees of freedom, and returns the df minimising the BIC or AIC.

Usage

dfset(x, y, data = parent.frame(), FUN = BIC, df = 1:15, plot = FALSE,
  ...)

Arguments

x

vector of x coordinates.

y

vector of y coordinates.

data

data frame containing x and y.

FUN

function to be minimised (e.g. BIC or AIC).

df

vector of degrees of freedom to be searched.

plot

logical controlling plotting of FUN versus df.

…

parameters to pass to plot.

Value

Optimal degrees of freedom.

Examples

# NOT RUN {
data(heights)
dfset(age, height, heights, FUN=BIC, plot=TRUE)
dfset(age, height, heights, FUN=function(a) AIC(a, k=1))
# }