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Help in curve fitting tool

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Abdul Samad
Abdul Samad 2011-3-8
关闭： MATLAB Answer Bot 2021-8-20
I've a curve(x and y values) and I've to apply following custom equation and have to find the unknown parameters A and B
y=3.379-(A*X^2/(B+X))
I'm using the Cftool and using the custom equation button but what I see there is not any option(or it appears to me) of entering the above equation I've mentioned. Please guide me how to fix this issue.

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回答（1 个）

Andreas Goser
Andreas Goser 2011-3-8
Things that could go wrong
  • The user does not see the tab "general equations" when creating a new fit
  • Issues with variable / parameter names like upper and lower case x
  • Equation not correct with regards to operators - .* vs *, .^ vs ^ and so on
  • Last not least it could be that your data just does not match...

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