How do I plot a single vertical line in matlab?

Question

theta = linspace(0,2*pi,200); y = theta;x = 10;plot(x,y,'o');

When i write this i get the points but when i replace plot(x,y,'o') with plot(x,y) I should get a vertical line at x=4 but the graph comes empty..

Answer 1

You can use stem

x = 10;
y = 200;
stem(x,y,'Marker','none');