Hi Andrea,
You can use "linspace" to create a large number of points over your given range, then calculate the function value at each iteration of the loop, and then calculate the area using the function value and the size of the step. You could plot the area at each step of the loop, or any other values, depending on what exactly you want to plot.
Here's a quick example, using cos(x):
totalArea = 0;
x = linspace(0,pi,10000);
f = zeros(1,length(x));
stepSize = x(2) - x(1);
for i = 1:length(x)
f(i) = cos(x(i));
totalArea = totalArea + f(i) * stepSize;
end
disp(totalArea);
Alternatively, if you only need to find the integral, you can use the function "integral", as described on the following documentation page:
