Numerical integration of product of two data sets

How do I calculate the yearly energy production with numerical integration? The equation can be seen in the image. Maybe with trapz?

    T=24*365; % [hours] is the number of hours in a year
    V_ci=4;  % [m/s] V_wind_cut_in
    V_co=20; % [m/s] V_wind_cut_out

V=0:1:20; % [m/s] wind speed

    P_el= [ 0  0  0  0  0  519482.264098907  748054.460302427  1018185.23763386  1329874.59609320  1683122.53568046  2077929.05639563  2514294.15823871  2992217.84120971  2992000  2992000  2992000  2992000  2992000  2992000  2992000  2992000 ];

f = [ 0 % Weibull_distribution_10m
0.056538236
0.096305348
0.121065264
0.130912872
0.127858306
0.115316502
0.097215032
0.077176425
0.057982037
0.041369159
0.0281032
0.018213392
0.011278766
0.006682186
0.003791554
0.002062248
0.001076013
0.000538929
0.000259257
0.00011985 ];

Answer 1

[Sean de Wolski]

So:

T*trapz(V,P_el.*f.')

If P_el and f are both functions of V.

Note the transpose since f was the only vector you defined as a column.