How to plot Left - Rigth - Mid riemman sum of this code?

I have this code, its for the left riemman sum

how can i plot this?

x1 = 1;
x2 = 4;
f=@(x)x;
n=500;
dx=(x2-x1)/n;
leftSum=0.0;

for i=1:n
  leftSum=leftSum+f(x1+dx*(i-1));
  
end

leftSum=leftSum*dx;

x = linspace(0,11);
y = linspace(0,11);

xa = linspace(0,10,11);

z=integral(f,x1,x2);

Answer 1

[Monisha Nalluru]

You can use bar and plot function and achieve the required output

As an example

lowerlimit = 1;
upperlimit = 4;
bins = 10;
x = linspace(lowerlimit,upperlimit); % points for function
y = x;
xa = linspace(lowerlimit,upperlimit,bins); % for bar plot points 
ya = xa;

bar(xa,ya,'histc')
hold on
plot(x,y);
hold off

You can change the xa,ya values according to your function handle inputs!