title: xlab and ylab in barplot not being displayed
body: <p>So I have specified some strings to both <code>xlab</code> and <code>ylab</code> in the <code>barplot</code> function but I they are not being displayed for some reason. Also, I have specified <code>beside=T</code> and the bars don't position side by side. Here's the code:</p>
  
  <pre><code>barplot(height=c(mean(d2$tconv[d2$NFUP==1]), mean(d2$tconv[d2$FUP==1])),
          col = c(2,3), names.arg=levels(d$progu1), 
          main="Tiempo de Conversión según si el usuario convertido ha acabado la 1era Unidad",
          ylim=c(0,max(mean(d2$tconv[d2$FUP==1]), mean(d2$tconv[d2$NFUP==1]))+10),
          xlab="Uso", ylab="Tiempo hasta Conversión", border=F, beside=T)
  </code></pre>
  
  <p>Here's the result. Zooming doesn't help:</p>
  
  <p><a href="https://i.stack.imgur.com/kO4VT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kO4VT.png" alt="enter image description here"></a></p>