approximation by periodic polynomial spline functions

cubic polynomial spline

cubic trigonometric polynomial spline curve

exponential polynomial function

Piecewise polynomial function

PLPF Piecewise Linear Polynomial Function

Polynomial Function

polynomial function model

Polynomial spline

polynomial spline estimates

polynomial spline estimation

Polynomial spline lag

Polynormial function fitting

quadratic polynomial function smoothing-method

shape preserving polynomial spline

algebraic-trigonometric spline function

B - Spline function

B spline function

B spline function with two dimension