Question on curve fit.

  • #1
I have two curves 1+m1*log(x) and 4.5+m2*log(x) [please see the attached picture]. I want to fit a third curve (which might of any equation), which should actually 'balance' the first two curves, so that the error is minimum. My problem is I am not able to get a initial reduced slope in the third curve when I try to fit with an eqn (in excel) of form a+b*log(x). I have a feeling like adding a negative exponential or something similar to that with eqn of form a+b*log(x) we might arrive at a curve similar to curve 3 [please see the attached picture]. Any suggestions? Thanks guys.
 

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  • #2
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I have two curves 1+m1*log(x) and 4.5+m2*log(x) [please see the attached picture]. I want to fit a third curve (which might of any equation), which should actually 'balance' the first two curves, so that the error is minimum. My problem is I am not able to get a initial reduced slope in the third curve when I try to fit with an eqn (in excel) of form a+b*log(x). I have a feeling like adding a negative exponential or something similar to that with eqn of form a+b*log(x) we might arrive at a curve similar to curve 3 [please see the attached picture]. Any suggestions? Thanks guys.
What do you mean by "balance" the first two curves? And what error are you talking about?
 

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