The SPLINE method fits a cubic spline curve to the input values. A cubic spline is a segmented function consisting of third-degree (cubic) polynomial functions joined together so that the whole curve ...
The Canadian Journal of Statistics / La Revue Canadienne de Statistique, Vol. 19, No. 3 (Sep., 1991), pp. 323-339 (17 pages) A method based on the principle of unbiased risk estimation is used to ...