Regression

Approximates a discrete function using least squares polynomial fitting.

double Discrete_once (int N, double *x, double *y, int degree, double a)

Approximates an arbitrary function using Forsythe orthogonal polynomials.

double Forsythe_once (int n, double *x, double *y, int degree, double a)

Calculates the linear regression parameters and evaluates the regression line at arbitrary abscissas

double Linear_once (int n, double *x, double *y, double a)

Evaluates the logistic regression curve built from a given set of points.

double Logistic_once (int n, double *x, double *y, double a)

Approximates an arbitrary function using orthogonal polynomials.

double Orthogonal_once (int n, double *x, double *y, int degree, double a)

Approximates an arbitrary function using parabolic least squares fitting.

double Parabolic_once (int n, double *x, double *y, double a)

Approximates a given function using the Stiefel-Remes method.

double Stiefel_once (int n, double *x, double *y, int degree, double a)

univariate regression, polynomial regression, orthogonal polynomials, nonlinear