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Differentiating splines

  1. May 2, 2005 #1
    I have made a simple spline(x,y) of 4 datapoints and I want to differentiate it.
    I can't get it to work; I have tried fntlr, fnder ect.

    Can anyone help?
  2. jcsd
  3. May 2, 2005 #2
    Have you tried shouting at it?

    What program are you using? Don't bother with built in functions, just use a finite different scheme and find it yourself. Are you familiar with those?
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