public static double Derivative(RealFunction targetFunction, double x, DifferencesDirection direction)
{
if (targetFunction == null)
{
throw new ArgumentNullException("targetFunction");
}
switch (direction)
{
case DifferencesDirection.Backward:
{
return(NumericalDifferentiator.BackwardDerivative(targetFunction, x));
}
case DifferencesDirection.Central:
{
return(NumericalDifferentiator.CentralDerivative(targetFunction, x));
}
case DifferencesDirection.Forward:
{
return(NumericalDifferentiator.ForwardDerivative(targetFunction, x));
}
}
throw new ArgumentOutOfRangeException("direction");
}
public static double Derivative(RealFunction targetFunction, double x)
{
if (targetFunction == null)
{
throw new ArgumentNullException("targetFunction");
}
return(NumericalDifferentiator.Derivative(targetFunction, x, DifferencesDirection.Central));
}
public static double CentralDerivative(RealFunction targetFunction, double x)
{
double num1;
if (targetFunction == null)
{
throw new ArgumentNullException("targetFunction");
}
return(NumericalDifferentiator.CentralDerivative(targetFunction, x, out num1));
}
public static RealFunction CreateForwardDelegate(RealFunction targetFunction)
{
if (targetFunction == null)
{
throw new ArgumentNullException("targetFunction");
}
NumericalDifferentiator differentiator1 = new NumericalDifferentiator(targetFunction);
return(new RealFunction(differentiator1.FormardDerivative));
}
private double CentralDerivative(double x)
{
return(NumericalDifferentiator.CentralDerivative(this._function, x));
}
private double FormardDerivative(double x)
{
return(NumericalDifferentiator.ForwardDerivative(this._function, x));
}
private Function CalculateNumericalDerivative()
{
return(new Explicit2DFunction(
NumericalDifferentiator.CreateDelegate(_function)));
}