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ntamas / plfit

Fitting power-law distributions to empirical data, according to the method of Clauset, Shalizi and Newman
GNU General Public License v2.0
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implement the first (and second) derivative of the Hurwitz zeta function #16

Closed jgmbenoit closed 6 years ago

jgmbenoit commented 6 years ago

in view to fix the underflow issue #13 . The issue remains, unfortunately.

ntamas commented 6 years ago

As mentioned here, I think that having a more accurate form of hzeta_deriv() won't help with the numerical issues because we would need that for the derivative of log(hzeta(x, xmin)) w.r.t. x instead.

jgmbenoit commented 6 years ago

I am on my way to make a second pull request that implements the logarithm of the Hurwitz zeta and the logarithm derivative of the Hurwitxz function (wrt to x). So now I close this very pull.