ILNumerics Ultimate VS

ILMathdiGamma Method

ILNumerics Ultimate VS Documentation
ILNumerics - Technical Application Development
Computes the Digamma function which is mathematically defined as the derivative of the logarithm of the gamma function. For more details about this function, see Wikipedia - Digamma function and Wolfram MathWorld - Digamma function.

[ILNumerics Computing Engine]

Namespace:  ILNumerics
Assembly:  ILNumerics.Computing (in ILNumerics.Computing.dll) Version: (5.5.7503.3146)

public static RetArray<double> diGamma(
	InArray<double> xi


Type: ILNumericsInArrayDouble
The point where the function is evaluated.

Return Value

Type: RetArrayDouble
The value of the DiGamma function at xi.

  • If the input xi is null, ArgumentNullException will be thrown.
  • If the input xi is empty, an empty array will be returned.
  • If any element of x is xi == double.NaN or xi == double.NegativeInfinity, there will be a double.NaN returned at that element.
  • If any element of x is xi == double.PositiveInfinity, there will be a double.PositiveInfinity returned at that element.
  • If any element of x is xi < 0 and is a round number, there will be a double.NegativeInfinity returned at that element.

[ILNumerics Computing Engine]

See Also