Help in curve fitting tool

2011 3 8
1 个回答
更新时间：2021 8 20
1 次查看（30 天）

0 个投票

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.

回答（1 个）

Andreas Goser
Andreas Goser 2011-3-8

0 个投票

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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