Evaluates the Poisson probability density function.
Namespace: Imsl.StatAssembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0
Syntax public static double Poisson(
int k,
double theta
)
Public Shared Function Poisson (
k As Integer,
theta As Double
) As Double
public:
static double Poisson(
int k,
double theta
)
static member Poisson :
k : int *
theta : float -> float
Parameters
- k
- Type: SystemInt32
An int scalar for which the Poisson
probability function is to be evaluated.
- theta
- Type: SystemDouble
A double scalar value representing the
mean of the Poisson distribution.
Return Value
Type:
DoubleA
double scalar value representing the
probability that a Poisson random variable takes a
value equal to
k.
Remarks Method Pdf.Poisson evaluates the probability density function of
a Poisson random variable with parameter theta.
theta, which is the mean of the Poisson random variable,
must be positive. The probability function (with
) is
Pdf.Poisson evaluates this function directly, taking
logarithms and using the log gamma function.
See Also