'SciPy Interpolation: Value Error - Python

I have 2 np.arrays with the same length, new_phase and phase_av .

When trying to run:

Fxi = interp1d(np.ravel(new_phase), np.ravel(phase_av), fill_value='extrapolate')

I get a ValueError: x and y arrays must have at least 2 entries

Both arrays have 360 items and are the same length. why am I getting this error??

Thank you!



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