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..., method = 3) : unused argument(s) (cv ...) > Setting norder=2 doesn't produce an error but summary indicates norder=1. > traj.spl <- sm.spline (time,x, norder=2, cv=FALSE) > summary (traj.spl) Length Class Mode norder 1 -none- numeric x 36 -none- numeric ysmth 36 -none- numeric lev 36 -none- numeric gcv 1 -none- numeric cv 1 -none- numeric df 1 -none- numeric spar 1 -none- numeric call 6 -none- call > Has anybody been able to fit quintic splines with Pspline or has some advise how to avoid the Sing...