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Re: how can one use mathematica get the approximate derivative of {x,y} data points?


Depends on what specifically you have for input, and what specifically you require from a result. Any of interpolation, finite differencing, or Fourier methods might be appropriate for the task at hand.

Some of this was discussed once here.

http://forums.wolfram.com/mathgroup/archive/2003/Apr/msg00627.html

https://groups.google.com/forum/?hl=en#!searchin/comp.soft-sys.math.mathematica/lichtblau$20derivative$20fourier/comp.soft-sys.math.mathematica/mBV0fAqOUmE/pA4ueiXmc5wJ

Daniel Lichtblau
Wolfram Research



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