 <p>For smaller numbers (counts) you can use <code>stripchart</code> with <code>method="stack"</code> like this:</p> <pre><code>stripchart(c(rep(0.3,10),rep(0.5,70)), pch=19, method="stack", ylim=c(0,100)) </code></pre> <p>But stripchart does not work for 700 dots.</p> <hr> <p><em>Edit:</em></p> <p>The <code>dots()</code> function from the package <a href="http://cran.r-project.org/web/packages/TeachingDemos/index.html" rel="nofollow">TeachingDemos</a> is probably what you want:</p> <pre><code> require(TeachingDemos) dots(x) </code></pre>