WorksheetFunction.BesselK Method
Returns the modified Bessel function, which is equivalent to the Bessel functions evaluated for purely imaginary arguments.
Syntax
expression.BesselK(Arg1, Arg2)
expression A variable that represents a WorksheetFunction object.
Parameters
| Name | Required/Optional | Data Type | Description |
|---|---|---|---|
| Arg1 | Required | Variant | the value at which to evaluate the function. |
| Arg2 | Required | Variant | the order of the function. If n is not an integer, it is truncated. |
Return Value
Double
Remarks
- If x is nonnumeric, BesselK generates an error value.
- If n is nonnumeric, BesselK generates an error value.
- If n < 0, BesselK generates an error value.
- The n-th order modified Bessel function of the variable x is:
where Jn and Yn are the J and Y Bessel functions, respectively.