title: R Base Graphic: Annotate with logical symbols (and/or)
body: <p>I would like to add the logical symbols <code>and</code> (∧) and <code>or</code> (∨) to a base graph in <code>R</code>.</p>
  
  <p>I figured that the way to go will probably be using an expression, but I can't figure out how, as their unicode codes <code>\u2227</code> and <code>\u2228</code> are not working. Perhaps because I am on windows (win 7, 64 bit).</p>
  
  <p>What I have:</p>
  
  <pre><code>plot(1, 1, pch = "")
  text(1, 1.2, 
       expression(paste("low ", italic(P), "(", italic(p), " and ", italic(q), 
          "), -1 SD")), cex = 1.2)
  text(1, 0.8, 
       expression(paste("low ", italic(P), "(\u00ac", italic(p), " or ", italic(q), 
           "), -1 SD")), cex = 1.2)
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/fIq9O.png" alt="enter image description here"></p>
  
  <p>I would like to replace the literal <code>and</code> and <code>or</code> with their symbol counterpart. </p>