Engineering - BESSELK Function
Description
The BESSELK function returns the modified Bessel function Kn(x), which is equivalent to the Bessel functions evaluated for purely imaginary arguments.
These are also known as the hyperbolic Bessel Functions.
Syntax
BESSELK(X, N)
Arguments
Argument | Description | Required/ Optional |
---|---|---|
X | The value at which to evaluate the function. | Required |
N | The order of the function. If n is not an integer, it is truncated. | Required |
Notes
If x is nonnumeric, BESSELK returns the #VALUE! Error value.
If n is nonnumeric, BESSELK returns the #VALUE! Error value.
If n < 0, BESSELK returns the #NUM! Error value.
The n-th order modified Bessel function of the variable x is −
$$K_n(x)=\frac{\pi}{2}i^{n+1}[J_n(ix)+iY_n(ix)]$$
Where Jn and Yn are the J and Y Bessel functions, respectively.
Applicability
Excel 2007, Excel 2010, Excel 2013, Excel 2016