Excel BESSELI function

Function              BESSELI

Description        The Excel BESSELI function calculates the modified Bessel functions, In(x), (also known as the hyperbolic Bessel Functions). These functions are the equivalent of the Bessel functions, evaluated for purely imaginary arguments.

Syntax                  BESSELI( x, n )

X             Required. The value at which to evaluate the function.

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

Example:

Usage Notes:

  • If X is non-numeric then it returns #VALUE! error.
  • If n is non-numeric then it returns #VALUE! error.
  • If n < 0 then it returns #NUM! error.