monomialpen {fda} | R Documentation |
The roughness penalty matrix is the set of inner products of all pairs of a derivative of integer powers of the argument.
monomialpen(basisobj, Lfdobj=int2Lfd(2), rng=basisobj$rangeval)
basisobj |
a monomial basis object. |
Lfdobj |
either a nonnegative integer specifying an order of derivative or a linear differential operator object. |
rng |
the inner product may be computed over a range that is contained within the range defined in the basis object. This is a vector or length two defining the range. |
a symmetric matrix of order equal to the number of monomial basis functions.
polynompen
,
exponpen
,
fourierpen
,
bsplinepen
,
polygpen
# set up a monomial basis for the first five powers nbasis <- 5 basisobj <- create.monomial.basis(c(-1,1),nbasis) # evaluate the rougness penalty matrix for the # second derivative. penmat <- monomialpen(basisobj, 2)