strength of materials in matlab

Hi. I try to draw a beam in matlab like in the picture. can somebody help me?

Answer 1

[KSSV]

P = [0 0] ;   
L = 1000 ;  % length of beam 
B = 0.5 ;   % breadth of beam 

B = [P ; L P(2) ; L B ; P(1) B] ; 

patch(B(:,1),B(:,2),'b')
ylim([-5 5])
box on