title: Get rid of auto spacing using bquote in r
body: <p>I am attempting to label a plot axis in r using the bquote function. The desired string includes the greek mu character and a variable.</p>
  
  <p>This results in spaces in either side of the mu: </p>
  
  <pre><code>xlab = bquote("Lake NO3 (" ~ mu ~ "mol/L): " ~ .(i))
  </code></pre>
  
  <p>How can I get rid of the spaces next to mu?</p>
  
  <p>I tried using paste and paste0 expressions, but neither of these allow both a greek character and a variable.</p>