Scipy interpolate/extrapolate spline

Question

I had a working python code that generates an interpolating function from row data:

scipy.interpolate.interp1d(Static_V_E[:,0], Static_V_E[:,1], kind =  INTERP_KIND, bounds_error=False, fill_value="extrapolate")

It was working with INTERP_KIND = "cubic" and it worked until a few days ago (I do not remember if I updated scipy/anaconda or something else). However, now the code crashes with the error:

ValueError: Extrapolation does not work with kind=spline

And I have to replace it with INTERP_KIND = "linear". This, of course, leads to much worse results in my calculation. Is there any way to have a better interpolation than the linear one, possibly without changing the syntax? (I have this function called hundred of times in the code, and I which to be able just to change INTERP_KIND or something else).

score 0 · Accepted Answer · answered Mar 14 '19 at 23:22

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Update your scipy. Cubic etc kinds extrapolate just fine from at least scipy 0.19.0.

answered Mar 14 '19 at 23:22

ev-br

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This solved the problem. I do not know why my version of scipy was downgraded to 0.18.0. Thanks a lot – Lorenzo Monacelli Mar 18 '19 at 15:07

Scipy interpolate/extrapolate spline

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