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 BackwardDerivative(RealFunction targetFunction, double x)
{
double num1;
if (targetFunction == null)
{
throw new ArgumentNullException("targetFunction");
}
return(NumericalDifferentiator.BackwardDerivative(targetFunction, x, out num1));
}
private double BackwardDerivative(double x)
{
return(NumericalDifferentiator.BackwardDerivative(this._function, x));
}
