- Polynomial function. Read the doc for polyfit
- Sum of ration of polynomial functions. Read the doc for rationalfit
Obtaining the equation from the graph that plotted
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Siti Fatimah Mohamed Hisham
il 2 Apr 2019
Commentato: Siti Fatimah Mohamed Hisham
il 3 Apr 2019
Hello. I am currently using MATLAB to obtain the equation of the graphs from oscilloscope. The data that I used to plot the graph was obtained from the oscilloscope, so the graph is quite unique.

As you can see from the picture, there are two datas. Hence, I need to obtain two different equations. Please show me how it's possible.
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Rostislav Teryaev
il 2 Apr 2019
Modificato: Rostislav Teryaev
il 2 Apr 2019
Do you need a symbolic equation? It is rather difficult to get one.
I suppose, there are two ways:
The first option can be (and I suppose will be) not accurate, because it is just one polynomial. So I don't reccomend it.
The second one can fit almost any data, but in my opinion it is more difficult to use. I can't give an example, because I only know the theory behind, but have never implemented it in matlab yet.
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