Simple curve fitting with CurveFit (or alternative)

When I tried to fit against the original (non-log) data, the only one that gave good results was fit = fitspline(x,y).


It’s just that spline doesn’t really tell me anything useful.

 -------- Spline fit --------------------------- 

 x spline: x = [0.001, 0.011...
 y spline: y = [1005.2007999999998, 90.34990000000002...

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