BESSELY

Returns the Bessel function, which is also called the Weber function or the Neumann function.

If this function is not available, run the Setup program to install the Analysis ToolPak. After you install the Analysis ToolPak, you must enable it by using the Add-Ins command on the Tools menu.

Syntax

BESSELY(x,n)

X   is the value at which to evaluate the function.

N   is the order of the function. If n is not an integer, it is truncated.

Remarks

• If x is nonnumeric, BESSELY returns the #VALUE! error value.
• If n is nonnumeric, BESSELY returns the #VALUE! error value.
• If n < 0, BESSELY returns the #NUM! error value.
• The n-th order Bessel function of the variable x is:

  

  where:

  

Example

BESSELY(2.5, 1) equals 0.145918