Interpolation, Approximations, Linear Fitting

E100 POLINT

Polynomial Interpolation

E102 MAXIZE

Maximum and Minimum Elements of Arrays

E103 AMAXMU

Largest Absolute Number in Scattered Vector

E104 FINT

Multidimensional Linear Interpolation

E105 DIVDIF

Function Interpolation

E106 LOCATF

Binary Search for Element in Ordered Array

E201 RLSQPM

Least Squares Polynomial Fit

E208 LSQ

Least Squares Polynomial Fit [Obsolete]

E210 NORBAS

Polynomial Splines / Normalized B-Splines

E211 RCSPLN

Cubic Splines and their Integrals

E222 RCHEBN

Solution of Overdetermined Linear System in the Chebychev Norm

E230 TL

Constrained and Unconstrained Linear Least Squares Fitting

E250 LFIT

Least-Squares Fit to Straight Line

E255 PARLSQ

Least-Squares Fit to Parabola [Obsolete]

E406 RCHECF

Chebyshev Series Coefficients of a Function

E407 CHSUM

Summation of Chebyshev Series

E408 RCHPWS

Conversion of Chebyshev to Power and Power to Chebyshev Series

E409 RTRGSM

Summation of Trigonometric Series