> Dear Pablo Fernandez,
>
> thanks a lot for your suggestion. Unfortunately, it does not work in my case
> and the error sounds a bit strange to me. As you suggested, I tried
> xx=[0.5*I, 1*I,
> 5*I,10*I,50*I,100*I,500*I,1000*I,5000*I,10000*I,5*10^4*I,10^5*I,5*10^5*I,10^6*I,5*10^6*I,10^7*I,5*10^7*I,10^8*I]
> yy=[f_1,f_2,
> f_3,f_4,f_5,f_6,f_7,f_8,f_9,f_10,f_11,f_12,f_13,f_14,f_15,f_16,f_17,f_18]
> points = zip(xx, yy)
> model(x) = (a_8*x^8 + a_7*x^7+ a_6*x^6 + a_5*x^5 + a_4*x^4 + a_3*x^3
> +a_2*x^2 + a_1*x + a_0) / (b_8*x^8 + b_7*x^7 + b_6*x^6 + b_5*x^5 +b_4*x^4 +
> b_3*x^3 + b_2*x^2 + b_1*x + b_0)
>
> fit = find_fit(points, model, solution_dict=True)
>
> but received the following error
>
...
>
> TypeError: data has to be a list of lists, a matrix, or a numpy array
>
> Any suggestion?
>
See the documentation. Just type on the notebook:
find_fit?
...
data – A two dimensional table of *floating point* numbers.
...

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