title: How to plot a circle in Matlab?
body: <p>I would like to know how can I graph circles in Matlab knowing the center and radius? I have tried <code>circles()</code> which does not seem to work because my Matlab version does not have it. I know I can use the Rectangle function to do so but it is a rather complex way of doing it as I would need to work out the leftmost point everytime.</p>
  
  <p>Isn't there a more simple way for me to draw a circle JUST knowing center and radius?</p>