[R] Splines with more restrictions

[BXC (Bendix Carstensen)]

I would like to generate a natural spline where the slope beyond the last knot (the right outer knot) is constrained to be 0.
Is that available in some package around?
_____________________

Bendix Carstensen
Senior Statistician
Steno Diabetes Center
Clinical Epidemiology
Niels Steensens Vej 2-4
DK-2820 Gentofte
Denmark
phone: +45 30 75 87 38
bxc at steno.dk   http://BendixCarstensen.com