Computes the Psi function.

Namespace: Meta.Numerics.Functions
Assembly: Meta.Numerics (in Meta.Numerics.dll) Version: 1.4.0.0 (1.4.0.0)

Syntax


	C#			Visual Basic			Visual C++

public static double Psi(
	double x
)

Public Shared Function Psi ( _
	x As Double _
) As Double

public:
static double Psi(
	double x
)

The value of ψ(x).

Remarks

The Psi function, also called the digamma function, is the logrithmic derivative of the Γ function.

To evaluate the Psi function for complex arguments, use Psi(Complex).