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)); }