How can the shear force diagram be plotted?

How can the shear force diagram be prepared through MATLAB for following figure?

Answer 1

[KSSV]

N = 10 ;
X = 1:N ;  % beam 
Y = zeros(1,N) ;
defo = rand(1,N) ;
idx = randsample(N,4) ;
defo(idx) = -defo(idx) ;

figure
hold on
plot(X,Y,'b') ;
plot(X,Y,'.r')
quiver(X,Y,zeros(1,N),defo)

[Akshay Pratap Singh]

Thanks @KSSV for try.