Using the C++ Math Library

Polynomial and Interpolation Functions

Data Interpolation 

Function	Purpose
griddata	Data gridding.
icubic	Cubic interpolation of 1-D function.
interp1	One-dimensional interpolation (1-D table lookup).
interp1q	Quick one-dimensional linear interpolation.
interp2	Two-dimensional interpolation (2-D table lookup).
interpft	One-dimensional interpolation using FFT method.

Spline Interpolation 

Function	Purpose
ppval	Evaluate piecewise polynomial.
spline	Piecewise polynomial cubic spline interpolant.

Geometric Analysis 

Function	Purpose
inpolygon	Detect points inside a polygonal region.
polyarea	Area of polygon.
rectint	Rectangle intersection area.

Polynomials 

Function	Purpose
conv	Multiply polynomials.
deconv	Divide polynomials.
mkpp	Make piece-wise polynomial.
poly	Construct polynomial with specified roots.
polyder	Differentiate polynomial.
polyfit	Fit polynomial to data.
polyval	Evaluate polynomial.
polyvalm	Evaluate polynomial with matrix argument.
residue	Partial-fraction expansion (residues).
resi2	Residue of a repeated pole.
roots	Find polynomial roots.
unmkpp	Supply information about piecewise polynomial.

Data Analysis and Fourier Transform Functions

Function Functions and ODE Solvers