tpsSx {ibr} | R Documentation |
The function evaluates the matrix Q and S related to the explanatory variables X at any points. This function is not intended to be used directly.
tpsSx(X,Xetoile,lambda,m=2)
X |
Matrix of explanatory variables, size n,p. |
Xetoile |
Matrix of new observations with the same number of variables as X, size m,p. |
lambda |
Coefficient lambda that control smoothness. |
m |
Order of thin plate splines. |
see the reference for detailed explanation of Q (the semi kernel) and S (the polynomial null space). Both matrices are computed using fields.
Returns a list containing two matrices denoted Sgu
(for null
space) and Qgu
Pierre-Andre Cornillon, Nicolas Hengartner and Eric Matzner-Lober
C. Gu (2002) Smoothing spline anova models. New York: Springer-Verlag.