title: How to include italics and subscripts in text on plot in R
body: <p>I am trying to include some model parameters on a plot in R using 'text' - here is an example:</p>
  
  <pre><code>text(1, 8, "t4 = 3.8")
  </code></pre>
  
  <p>I would like 't' to be in italics and '4' to be subscript. Does anyone know how to do this?</p>