Bessel functions?

    May 06 2007 | 2:32 pm
    I'm trying to find out how to implement a Bessel function. I've searched the forums and found that there is a function in JMSL, however, I cant afford it atm... does anyone know a free alternative? The equation in question is below:
    Jn(K r) (C1 cos(n theta) + C2 sin(n theta))
    All the best, Carl.

    • May 06 2007 | 3:24 pm
    • May 06 2007 | 7:51 pm
      Thanks man, as I'm not a mathematician can you explain how the Bessel function is implemented in the patch?
    • Sep 19 2018 | 3:39 am
      Nice approximation:
    • May 20 2019 | 8:02 pm
      I wonder where the crucial comment with the example patch in this thread has gone?