A nonparametric regression method based on belief functions. The method is described in:
S. Petit-Renaud and T. Denoeux. Nonparametric regression analysis of uncertain and imprecise data using belief Functions. International Journal of Approximate Reasoning, Vol. 35, No. 1, 1-28, 2004. postscript
Note: This version only deals with numerical inputs and outputs. The reliability of each output value can be entered as a weight. The general case of output values partially specified by belief functions is not handled in this version.