I generate several arrays from Simulink, then I perform some mathematical actions on it. I need to integrate this data into a vector how can i do that?

the relevant code is : Pnc = (Tau1.*Thetadot) + (Tau2.*(Phidot-Thetadot)); Tau1,Tau2,Thetadot and Phidot are vectors from simulink (by using "to workspace" blocks) This is an expression for power, I need to integrate it to get a vector of energy values.