BESSELI:
Returns the modified Bessel function In(x)
The BESSELI function returns the modified Bessel function, which is equivalent to the Bessel function evaluated for purely imaginary arguments.
BESSELI takes
2 required arguments and
no optional arguments:
Syntax: BESSELI(x,
n)
Using the BESSELI function:
The arguments for the BESSELI function are:
Argument

Required?

Description

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. 
• If x is nonnumeric, BESSELI returns the #VALUE! error value. 
• If n is nonnumeric, BESSELI returns the #VALUE! error value. 
• If n < 0, BESSELI returns the #NUM! error value. 
The BESSELI function the modified Bessel function, which is equivalent to the Bessel function evaluated for purely imaginary arguments.