MATLAB: Area under the graph

Question

how can i colored area which is under the graph (eg y=mx+c or any graph)with the boundary condition let say x is 2-5 and find the colored area ?

Answer 1

You can use fill() to color in the area under the graph of a line, and you can use a numerical integration method like quad() to compute the integral:

   x = 0:0.01:1;
   y = 2*x-2;
   axis([0 1 -2 0]);
   x1 = [0 1 1];
   y1 = [-2 -2 0];
   fill(x1,y1,'r');
   hold on;
   plot(x,y,'k','linewidth',2);
   Q = quad(@(x) 2*x-2,0,1)