Cutom Curve Fit for mixed plot
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Hi, I am trying to fit a custom equation to my data. Using cuve fitting tool box the closest was exp1 fit but it is still not a good fit. I tried the other available fits as well and it did not turned out good. As you see from the attached file at the beginning it is a linear , in the middle it is like exp and at the end it is different than linear and exp fit.
What are your recommendation as an equation to fit that curve.
Abhiroop Rastogi on 23 Feb 2022
The data shown in the figure looks like it is representing a Weibull Distribution. You can try the inbuilt fittype "weibull" for fitting the curve using the command:
fitCurve = fit(xData,yData,'weibull');
Another fit-type that can be used for the data is "cubicspline" which does a piecewise computation for fitting the curve.
You can use the following command for cubicspline fitting.
fitCurve = fit(xData,yData,'cubicspline');
You can see the resulted plots in the figures attached.