

   RRoobbuusstt tthhiinn ppllaattee sspplliinnee rreeggrreessssiioonn

        rtps(..., max.iter=20, acc=10 * .Machine$single.eps^0.5, finish=F,
        conv.method="lambda")

   AArrgguummeennttss::

        ...: Arguments for tps function. Matrix of independent
             variables x and vector of dependent variables Y
             are required.

   max.iter: Maximum number of iterations to convergence.

        acc: Accuracy of convergence criteria.

     finish: Finish the iterations with two iterations of the
             bisquare.

   conv.method: Method of convergence, lambda or weights.

   VVaalluuee::

        tps object.

   RReeffeerreenncceess::

        See Nonparametric Regression and Generalized Linear
        Models by Green and Silverman.

        See Additive Models by Hastie and Tibshirani.

   SSeeee AAllssoo::

        tps, summary.tps

   EExxaammpplleess::

        #2-d example
        rtps(ozone$x, ozone$y) -> fit # fitting a surface to ozone measurements,
        using iterative reweighted least squares.
        plot(fit) # plots fit and residuals

