Complex Bessel functions in LV 2009?

[Peter Dias]

Can anyone please clarify whether the Bessel functions in LV 2009 operate on complex inputs and give complex outputs? The "Help" text mentions only real outputs.

A quick test on the Bessel function Jv of zeroth order seems to indicate that it accepts a complex input but delivers a real output. Does it just ignore the imaginary part of the input?

Any input much appreciated, thanks!

Peter

[ttrr]

Hi Peter,

The Bessel function in LabVIEW 2009 can not operate on complex input. If you specify a complex input, it will be casted to real. You should see a red dot which indicates the cast.

[Peter Dias · Accepted solution]

Hi ttrr

Many thanks for your prompt and helpful explanation. I thought something like that was happening, your confirmation much appreciated.

The only viable solution I have found is using Matlab (Excel BESSELJ cannot handle complex inputs either).

Regards

Peter

[GrantM]

Hello Peter,

LabVIEW MathScript can support real-order Bessel functions with complex inputs.  Reference the help for the bessel_j function, in particular.

Grant M.
Senior Software Engineer | LabVIEW MathScript | National Instruments

[Peter Dias]

Hi Grant

Thanks for your input. Using the LV MathScript add-on is definitely an option from the cost point of view. You tip much appreciated!

Regards

Peter