Python Scipy: Unsupported Operand Type(s) For ** Or Pow(): 'list' And 'list'

I need to fit function to array of data and get optimal coefficients of an equation of this function. I use curve_fit method from scipy library. It is based on least squares method

Solution 1:

It looks like you're after element-wise power-raising?

Like a*x[i]**(b*x[i]) for each i?

In that case, you have to use the np.power function:

def func(x,a,b):
    return a*np.power(x,b*x)

Then it works.

(As an aside, it may be worthwhile to convert x and y from lists to numpy arrays: np.array(x)).