Integral of experimental data
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Hi, I'm tryng to solve an integral like this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/148631/image.png)
I have two data columns about variables P and V, both defined as function of an angle teta (-360<teta<360). How can I integrate this curve?
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Roger Stafford
le 2 Avr 2015
Modifié(e) : Roger Stafford
le 2 Avr 2015
Using 'g' in place of 'gamma', do this:
Q = (g*trapz(V,P)+trapz(P,V))/(g-1);
or if you want the cumulative integral, replace each 'trapz' by 'cumtrapz'.
This assumes that P and V are vectors of the same length with corresponding elements given by the same value of 'theta'.
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