title: Plot a heart in R
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/6542825/equation-driven-smoothly-shaded-concentric-shapes">Equation-driven smoothly shaded concentric shapes</a>  </p>
  </blockquote>
  
  
  
  <p>How could I plot a symmetrical heart in R like I plot a circle (using plotrix) or a rectangle?  </p>
  
  <p>I'd like code for this so that I could actually do it for my self and to be able to generalize this to similar future needs.  I've seen even more elaborate plots than this so it's pretty doable, it's just that I lack the knowledge to do it.</p>