smooth — smoothing by spline functions
[pt]=smooth(ptd [,step])
this function computes interpolation by spline
functions for a given set of points in the plane.
The coordinates are (ptd(1,i),ptd(2,i))
. The
components ptd(1,:)
must be in ascending order.
The default value for the step is
abs(maxi(ptd(1,:))-mini(ptd(1,:)))/100