I have a problem to derive an interpolation function. I am quite new to mathematica, so I suspect I miss something.
I interpolate the list
InterL = Interpolation[L, InterpolationOrder -> 1]
I verify that the interpolation works :
In:= InterL[400.6] Out= 686.8
If I plot InterL I have a similar curve as L except that is defined on everypoint.
Which doesn't look like the derivative of the precedent. I have tried to evaluate the derivative, etc. I can't find a solution.
Is it possible to derive this curve ?