bcurve                  nD B-curve governed by (x,y,...) control
                        points.
bsc                     Basis matrix and knot Jacobian for B-spline of
                        order 0 (step function) and higher
bsp                     Calculate B-spline values from their
                        coefficients qw and knots xk
bspline                 bspline: build and use B-splines for
                        interpolation and regression.
bsppar                  Retrieve parameters of B-splines
dbsp                    Derivative of B-spline
diffn                   Finite differences
dmat                    Differentiation matrix of B-spline
ibsp                    Indefinite integral of B-spline
iknots                  Estimate internal knot positions equalizing
                        jumps in n-th derivative
imat                    Integration matrix of B-spline
ipk                     Intervals of points in knot intervals
jacw                    Knot Jacobian of B-spline with weights
par2bsp                 Convert parameters to B-spline function
parr                    Polynomial formulation of B-spline
pbsc                    Polynomial B-spline Calculation of Basis Matrix
smbsp                   Smoothing B-spline of order n >= 0
