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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124217] how can one use mathematica get the approximate derivative of {x,y} data points?
  • From: "Michael B. Heaney" <mheaney at alum.mit.edu>
  • Date: Sat, 14 Jan 2012 02:53:28 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hi,

I have a set of {x,y} data points:

 {{0.03512, -0.5}, {0.0351181, -0.499}, ... {-0.113972, 0.699}, {-0.115072,
0.7}}

These data points look like a function y=f(x) when plotted on the x-y axes.
However, I do not know what the function f(x) is. But I need to get the
approximate derivative df/dx, as another set of data points. How can one
use Mathematica to do this?

Thanks,

Michael

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