MATLAB: Sinc function

Question

At y=0, the graph is not plotted. How would I plot it, to compare to the sinc(x) function. Thanks in advanced.

x=-20:0.1:20;

y=(sin(pi*x))/(pi*x);

if x=0

.....

end

plot(x,y,);

hold on

plot (x,sinc(x),'*');

Answer 1

x = -20:0.0001:20;
y = (sin(pi*x))./(pi*x);
y(x==0) = 1;% If you don't get: (Warning: Divide by zero.) you missed 0.
plot(x,y)