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

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?

[Rishabh Gupta]

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

Answer 1

[Rishabh Gupta]

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.

[Torsten]

The values at the boundaries must be equal ...

[Rishabh Gupta]

You could try to incorporate the boundary points in both the intervals