mgcv
. It is called
by gam
to obtain the design matrix and penalty matrices for a GAM
set up using penalized regression splines. This is done by calling a mixture of
R routines and compiled C code. For further information on usuage see code for gam
.Wood, S.N. (2000) Modelling and Smoothing Parameter Estimation with Multiple Quadratic Penalties. J.R.Statist.Soc.B 62(2):413-428
Wood, S.N. (2003) Thin plate regression splines. J.R.Statist.Soc.B 65(1):95-114
gam
, mgcv