FunctionMath.FindZero(Func<Double, Double>, Func<Double, Double>, Double) Method

Finds a zero of a function starting from an initial guess.

Definition

Namespace: Extreme.Mathematics
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23

public static double FindZero(
	this Func<double, double> targetFunction,
	Func<double, double> derivativeOfTargetFunction,
	double initialGuess
)

Visual Basic

<ExtensionAttribute>
Public Shared Function FindZero ( 
	targetFunction As Func(Of Double, Double),
	derivativeOfTargetFunction As Func(Of Double, Double),
	initialGuess As Double
) As Double

C++/CLI

public:
[ExtensionAttribute]
static double FindZero(
	Func<double, double>^ targetFunction, 
	Func<double, double>^ derivativeOfTargetFunction, 
	double initialGuess
)

[<ExtensionAttribute>]
static member FindZero : 
        targetFunction : Func<float, float> * 
        derivativeOfTargetFunction : Func<float, float> * 
        initialGuess : float -> float

Parameters

targetFunction Func<Double, Double>: A delegate that represents a function of one variable that specifies the function on the left-hand side of the equation.
derivativeOfTargetFunction Func<Double, Double>: A delegate that represents a function of one variable that specifies the derivative function of targetFunction.
initialGuess Double: An initial guess for ther zero.

Return Value

Double
The best approximation to a zero of targetFunction.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Func<Double, Double>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Remarks

Use this method when you have very little information about the location of the zero.

Exceptions

ConvergenceException

The algorithm failed to converge to a solution.