title: text() to display a greek letter with subscript in R plot
body: <p>I was wondering how I could make the letter "<strong>sigma</strong>" appear in Greek <strong>with the subscript</strong> "<strong><em>m</em></strong>" in the <strong>text()</strong> part of the <strong>R code below?:</strong></p>
  
  <pre><code>curve(dnorm(x,175.3,.961),160,190,type="l")
  
  sigmam &lt;- dnorm(177.4,175.3,.961)/ dnorm(177.4,176,4)
  
  text(165,.285,paste("sigmam", "=", round(1/sigmam,digits=2)))
  </code></pre>