DecimalMath.Log1PlusX Method

Returns the logarithm of 1 plus the argument.

Definition

Namespace: Numerics.NET
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.3
C#
public static decimal Log1PlusX(
	decimal x
)

Parameters

x  Decimal
A real number greater than -1.

Return Value

Decimal
The logarithm of 1 plus x.

Remarks

For small values of x, the logarithm of 1 + x is close to zero. When the logarithm is evaluated directly, this can cause significant round-off error. This function resolves this problem by using a direct approximations for x close to 1.

Exceptions

ArgumentOutOfRangeException

x is less than or equal to -1.

See Also