scipy.optimize.curvefit() - array must not contain infs or NaNs

Question

I am trying to fit some data to a curve in Python using scipy.optimize.curve_fit. I am running into the error ValueError: array must not contain infs or NaNs.

Answer 1

Your function has a negative power (x^-alpha) this is the same as (1/x)^(alpha). If x is ever 0 your function will return inf and your curve fit operation will break, I'm surprised a warning/error isn't thrown earlier informing you of a divide by 0.

BTW why are you multiplying and dividing by 1?