Is there a way to do a polynomial fit and an exponential fit on a single plot at two different intervals in the plot?

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Ken Mathai 2018-9-19

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评论： Rishabh Gupta 2018-9-28

For example: I have a plot of a an array containing y and x variables. The graph has three distinct curves from the data. I want to approximate an exponential function for one interval, a polynomial function for the second.

How would I go about doing this?

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Rishabh Gupta 2018-9-28

Do you exactly know the interval for which you need to fit an exponential and the polynomial function?

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Rishabh Gupta 2018-9-28

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Hi Ken,

If you know the interval for the three distinct curves, then one of the approach would be to divide your data into 3 subsets and fit respective functions to those subsets. Then you can easily plot the fitted functions onto the same plot.

Hope this helps.