Erfc Method (x)

Computes the complementary error function.

Declaration Syntax

Visual Basic

Visual C++

public static double Erfc(
	double x
)

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

public:
static double Erfc(
	double x
)

static member Erfc : 
        x:float -> float

Parameters

x (Double): The argument.

Return Value

The value of erfc(x) = 1 - erf(x).

Remarks

The complementary error function can be used to express the area in the tails of a Bell curve beyond a given distance from its center.

It can be defined via an integral:

For small values of x, erfc(x) ≈ 1 to within floating-point accuracy. To obtain accurate values of erfc(x) = 1 - erf(x) in this region, use the Erf(Double) function.