L8 : Regression (search also classes D5, D6, D9, G, K)

L8a:	Simple linear (i.e., $y = b_{0} + b_{1} x$ ) (search also class L8h)	(6 routines)
L8b:	Polynomial (e.g., $y = b_{0} + b_{1} x + b_{2} x^{2}$ ) (search also class L8c)	(1 routine)
L8c:	Multiple linear (i.e., $y = b_{0} + b_{1} x_{1} + \dots + b_{p} x_{p}$ )	(35 routines)
L8d:	Polynomial in several variables	(0 routines)
L8e:	Nonlinear (i.e., $y = F (X, b)$ ) (search also class L8h)	(16 routines)
L8f:	Simultaneous (i.e., $Y = X b$ )	(0 routines)
L8g:	Spline (i.e., piecewise polynomial)	(5 routines)
L8h:	EDA (e.g., smoothing)	(1 routine)
L8i:	Service routines (e.g., matrix manipulation for variable selection)	(6 routines)