jacw {bspline}

Knot Jacobian of B-spline with weights

Description

Knot Jacobian of B-spline with weights

Usage

jacw(jac, qws)

Arguments

jac

Numeric array, such as returned by bsc(..., cjac=TRUE)

qws

Numeric matrix, each column is a set of weights forming a B-spline. If qws is a vector, it is coerced to 1-column matrix.

Value

Numeric array of size nx x ncol(qw) x nk, where nx=dim(jac)[1] and nk is the number of knots dim(jac)[3]+n+1 (n being polynomial order).