Package smile.math

Interface DifferentiableFunction

All Superinterfaces:

Function, Serializable

All Known Implementing Classes:

Exp, Kurtosis, LogCosh

public interface DifferentiableFunction
extends Function

A differentiable function is a function whose derivative exists at each point in its domain.

Method Summary

Modifier and Type	Method	Description
double	g(double x)	Computes the gradient/derivative at x.
default double	g2(double x)	Compute the second-order derivative at x.

Methods inherited from interface smile.math.Function

apply, f, inv

Method Details

g

double g(double x)

Computes the gradient/derivative at x.

Parameters:

x - a real number.

Returns:

the derivative.

g2

default double g2(double x)

Compute the second-order derivative at x.

Parameters:

x - a real number.

Returns:

the second-order derivative.