WorksheetFunction.BesselI (Excel)

Returns the modified Bessel function, which is equivalent to the Bessel function evaluated for purely imaginary arguments.

If x is nonnumeric, BesselI returns the #VALUE! error value. If n is nonnumeric, BesselI generates an error value. If n < 0, BesselI generates an error value. The n-th order modified Bessel function of the variable x is

BesselI (Arg1, Arg2)

Dim dblBesselI As Double
dblBesselI = WorksheetFunction.BesselI(Arg1:=, Arg2:=)


Arg1, Arg2

Arg1 - The value at which to evaluate the function

Arg2 - The order of the Bessel function. If n is not an integer, it is truncated