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Integral of experimental data

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Antonio
Antonio 2015-4-2
编辑： Roger Stafford 2015-4-2
Hi, I'm tryng to solve an integral like this:
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
Roger Stafford 2015-4-2
编辑：Roger Stafford 2015-4-2
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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