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NonlinearFit

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42587] NonlinearFit
  • From: Roger Mason <rmason at sparky2.esd.mun.ca>
  • Date: Thu, 17 Jul 2003 03:45:06 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

NonlinearFit[dat, 1/c0 + 1/(c1*Exp[-c2/(0.695 T4)]), T4, {c0, c1, c2}]
returns the error

NonlinearFit::nonnum: "The model is not numerical at {c0->1, c1->1,
c2->1, T4->14.}. Check that all model parameters are included in the
parameter list.

There are 3 parameters in the model and all three _are_ given in the
parameters list.  On calculating the value of the function with c0=1,c1=1,
c2=1 the value 1.902 is returned.  In what way is that 'non-numerical'?

Thanks for your help,
Roger Mason



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