title: R axis not displayed
body: <p>I am afraid I have lost the plot, literally! Why does the axis command not put an x axis in the following plot? It must be something ridiculous, as I can't simplify much more.</p>
  
  <pre><code>yar &lt;- c(.2,.1,.05,.03,.02)
  plot(yar,xaxt='n')
  axis(1, at=c(0.01,0.02,0.03,0.04,0.05))
  </code></pre>