high = csvread('high2');
medium = csvread('medium2');
low = csvread('low2');

figure;
subplot(3,1,1)
plot(high(:,2), high(:,1), 'r-');
subplot(3,1,2)
plot(medium(:,2), medium(:,1), 'g-');
subplot(3,1,3)
plot(low(:,2), low(:,1), 'b-');

trapz(high(:,2), high(:,1))
trapz(medium(:,2), medium(:,1))

trapz(low(:,2), low(:,1))