Returns the modified Bessel function, which is equivalent to the Bessel functions evaluated for purely imaginary arguments.
If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.
How?- On the Tools menu, click Add-Ins.
- In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
- If necessary, follow the instructions in the setup program.
Syntax
BESSELK(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, 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:
where Jn and Yn are the J and Y Bessel functions, respectively.
Example
The example may be easier to understand if you copy it to a blank worksheet.
- Create a blank workbook or worksheet.
- Select the example in the Help topic. Do not select the row or column headers.
Selecting an example from Help
- Press CTRL+C.
- In the worksheet, select cell A1, and press CTRL+V.
- To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.
|
|