# [R] PS

Terry Therneau therneau at mayo.edu
Thu Nov 18 15:21:32 CET 2010

 Note that there is NOT an intercept term in my pspline basis.  One of
the features of psplines is that \sum beta_i f_i(x) (where f_i are the
spline basis functions) is linear if and only if the coefficients beta
are a linear sequence.  This makes it easy to decompose the fit into
linear and non-linear effects.

Terry T