create.polygonal.basis {fda} | R Documentation |
A basis is set up for constructing polygonal lines, consisting of straight line segments that join together.
create.polygonal.basis(argvals=NULL)
argvals |
A strictly increasing vector of argument values at which line segments join to form a polygonal line. |
The actual basis functions consist of triangles, each with its apex over an argument value. Note that in effect the polygonal basis is identical to a B-spline basis of order 2 and a knot or break value at each argument value. The range of the polygonal basis is set to the interval defined by the smallest and largest argument values.
A basis object with the type "polyg".
basis.fd. create.basis, create.bspline.basis