Microsoft Office Tutorials and References

In Depth Information

**BESSELY**

The n-th order modified
BESSEL
function of the variable x is

where Jn and Yn are the J and Y
BESSEL
functions.

Figure 5.3

The
BESSELK
function

returns the modified

BESSEL
function for

imaginary arguments.

BESSELY

The
BESSELY
function returns the
BESSEL
function, also known as the Weber or Neumann

function. X is the value at which to evaluate the function. N is the order of the function.

=BESSELY(x,n)

The
BESSELY
function is found only if the Analysis Toolpak is installed. In addition it must be

turned on in the Add-Ins from the Tools menu. Both X and N must be numeric and greater

than zero. Notice the example in Figure 5.4.

The value to evaluate the function.

X

The order of the
BESSEL
function. Truncated if not an integer.

N

The n-th order
BESSEL
function of the variable x is

where