R-users
E-mail: r-help@r-project.org
   My understanding is that package "mgcv" is based on
"Generalized Additive Models: An Introduction with R (by Simon N. Wood)".
On the page 126 of this book, eq(3.4) looks a quartic equation with respect
to
"x", not a cubic equation. I am wondering if all routines which uses
cubic splines in mgcv are based on this quartic equation.
   In my humble opinion, the '^4' in the first term
of the second line of this equation should be '^3'.

K. Takezawa
-- 
*****    r.otasuke@gmail.com    *****
http://cse.naro.affrc.go.jp/takezawa/intro.html

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