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MathGroup Archive 1998

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Spatial statistics and NonlinearRegress

  • To: mathgroup at
  • Subject: [mg13873] Spatial statistics and NonlinearRegress
  • From: Ed Luschei <eluschei at>
  • Date: Wed, 2 Sep 1998 01:31:06 -0400
  • Sender: owner-wri-mathgroup at


(1) Has anyone out there done any MM work in spatial statistics? I'm
specifically interested in kriging.

(2) Is there a way to fit a piecewise function with NonlinearRegress?


f[x_,a_,b_,c_]:=a + b(1-Exp[-x/c]) /; x<c; f[x_,a_,b_,c_]:=a +
b(1-Exp[-1]) /; x>=c;

Doesn't seem to work because the df/dx doesn't exist at x=c.

Ed (eluschei at

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