[Numpy-discussion] NaN (Not a Number) occurs in calculation of complex number for Bessel functions

Dag Sverre Seljebotn d.s.seljebotn at astro.uio.no
Fri Dec 21 08:40:27 EST 2012

On 12/21/2012 02:30 PM, Happyman wrote:
> I have everything in C or Fortran...According to my friends
> recommendations I started learning Python for my research...
> Do you mean the functions which gave Nan result has not been developed
> properly yet in Python, Don't you????

The way most of NumPy and SciPy works is by calling into C and Fortran code.

> For about 1.5 months I have been facing the same problem for Bessel
> functions.. I think the code that I showed like an example is not
> working in Python.
> What to do ???

Do you have an implemention of the Bessel functions that work as you 
wish in C or Fortran? If so, that could be wrapped and called from Python.

Dag Sverre

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