Psi Method (x)

Computes the Psi function.

Declaration Syntax

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
)

static member Psi : 
        x:float -> float

Parameters

Return Value

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).