LogBessel.eval

classmethod LogBessel.eval(nu, value, method='approximate')

Evaluates the log of the modified Bessel function of the first kind using chosen method

Parameters

• nu – order of the Bessel

• value – scalar/array to evaluate

• method –

  method to evaluate the log-bessel function; one of:

  • ”approximate”: Uses scipy if possible and approximations if too small or large (error of up to 1%, but typically much smaller)

  • ”scipy”: uses the default scipy interpretation, which will return -np.inf or np.inf if too small/large

  • ”precise”: Uses mpmath to precisely evaluate the value. This is very slow

  • ”interpolate”: use cubic interpolation between pre-computed “precise” values. Will become slow if values vary too much.

Returns

log(Bessel_<nu>(<value>))