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Re: Undefined value during function evaluation

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Oh thank you! Now I´ve got the misstake. 
You are right. The Problem was that gnuplot gets zero in the common denominator. 
The Problem was, that I gave the start value d=30. In my data there was an x=30 and because of that gnuplot gets zero for x-d in the first run and fails. 

I solved the problem with commenting that value out so that I got a better value for d, d=30.0398. Then I put the problematical x=30 back into my list of data and gave the new start value d=30.0398 to gnuplot. Then it fitted the Funktion.

Thank you both.

Fleur

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Undefined value during function evaluation schmidtanna114@gmail.com - 2017-06-27 06:54 -0700
  Re: Undefined value during function evaluation Karl Ratzsch <mail.kfr@gmx.net> - 2017-06-27 18:01 +0200
  Re: Undefined value during function evaluation schmidtanna114@gmail.com - 2017-06-27 12:40 -0700
  Re: Undefined value during function evaluation Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-06-27 21:44 +0200
  Re: Undefined value during function evaluation schmidtanna114@gmail.com - 2017-06-28 07:16 -0700

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