NAG C Library

e02 – Curve and Surface Fitting

e02 Chapter Introduction

Routine
Name
Mark of
Introduction

Purpose
e02adc 5 nag_1d_cheb_fit
Computes the coefficients of a Chebyshev series polynomial for arbitrary data
e02aec 5 nag_1d_cheb_eval
Evaluates the coefficients of a Chebyshev series polynomial
e02afc 5 nag_1d_cheb_interp_fit
Computes the coefficients of a Chebyshev series polynomial for interpolated data
e02agc 7 nag_1d_cheb_fit_constr
Least-squares polynomial fit, values and derivatives may be constrained, arbitrary data points
e02ahc 7 nag_1d_cheb_deriv
Derivative of fitted polynomial in Chebyshev series form
e02ajc 7 nag_1d_cheb_intg
Integral of fitted polynomial in Chebyshev series form
e02akc 7 nag_1d_cheb_eval2
Evaluation of fitted polynomial in one variable from Chebyshev series form
e02bac 2 nag_1d_spline_fit_knots
Least-squares curve cubic spline fit (including interpolation), one variable
e02bbc 2 nag_1d_spline_evaluate
Evaluation of fitted cubic spline, function only
e02bcc 2 nag_1d_spline_deriv
Evaluation of fitted cubic spline, function and derivatives
e02bdc 2 nag_1d_spline_intg
Evaluation of fitted cubic spline, definite integral
e02bec 2 nag_1d_spline_fit
Least-squares cubic spline curve fit, automatic knot placement, one variable
e02cac 7 nag_2d_cheb_fit_lines
Least-squares surface fit by polynomials, data on lines
e02cbc 7 nag_2d_cheb_eval
Evaluation of fitted polynomial in two variables
e02dcc 2 nag_2d_spline_fit_grid
Least-squares bicubic spline fit with automatic knot placement, two variables (rectangular grid)
e02ddc 2 nag_2d_spline_fit_scat
Least-squares bicubic spline fit with automatic knot placement, two variables (scattered data)
e02dec 2 nag_2d_spline_eval
Evaluation of bicubic spline, at a set of points
e02dfc 2 nag_2d_spline_eval_rect
Evaluation of bicubic spline, at a mesh of points
e02gac 7 nag_lone_fit
L1-approximation by general linear function
e02gcc 7 nag_linf_fit
L-approximation by general linear function
e02rac 7 nag_1d_pade
Padé-approximants
e02rbc 7 nag_1d_pade_eval
Evaluation of fitted rational function as computed by e02rac

NAG C Library
© The Numerical Algorithms Group Ltd, Oxford UK. 2002