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T O P I C R E V I E W
smburu
Posted - 06/02/2016 : 10:31:47 AM I want to add a complex fit line (hyperbolic tangent) to my data. The equation is: y=A+B[1+tanh((Log10(x)-C-Q*1*10^6)/D)]. I have the plotted x and y data. I want OriginPro to find A,B,C,D fitting parameters based on my data. In this way, I can solve for Q. I have OriginPro 2016 software
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jasonzhao
Posted - 06/02/2016 : 11:38:44 PM hello,
You can call the tanh function to construct a user defined fitting function follow the tutorial
There are 4 parameters in this function, fitting could not converge due to mutual dependency exists between parameters, you need to set the initial values carefully.