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MathGroup Archive 2012

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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: [mg124309] how can one use mathematica get the approximate derivative of {x,y} data points?
  • From: dr DanW <dmaxwarren at gmail.com>
  • Date: Mon, 16 Jan 2012 17:12:57 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

The derivative curve you will get with Interpolation[]' can look very weird. I find I get better results using Interpolation[..., Method->"Spline"]'. The Spline function is continuous in first and second derivatives, so the resulting derivative is smoother.

Daniel



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