BesselI Method (Double, Int32) |
Evaluates a sequence of modified Bessel functions of the first kind
with integer order and real argument.
Namespace: Imsl.MathAssembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0
Syntax public static double[] I(
double x,
int n
)
Public Shared Function I (
x As Double,
n As Integer
) As Double()
public:
static array<double>^ I(
double x,
int n
)
static member I :
x : float *
n : int -> float[]
Parameters
- x
- Type: SystemDouble
A double representing the argument of the Bessel functions to
be evaluated.
- n
- Type: SystemInt32
The int order of the last element in the sequence.
Return Value
Type:
Double
A
double array of length n+1 containing the values of the
function through the series.
Remarks
Bessel.I[i] contains the value of the Bessel function of order i.
The Bessel function
is defined to be
The input
x must satisfy
where b is the largest representable
floating-point number. The algorithm is based on a code due to Sookne
(1973b), which uses backward recursion.
See Also