title: How to change the size of label values in xyplot in R
body: <p>I'm using <code>xyplot</code> in R to plot several lines (by group) on one graph:</p>
  
  <pre><code>xyplot(y~x,
         type=c('l'),
         scales=list(tck=c(1,0)),
         main=list(label="Total decrease", cex=2),
         xlab=list(label="Years", cex=1.5),
         ylab=list(label="Percentage", cex=1.5),
         groups= group,
         data=df,
         auto.key=list(columns=2, lines=TRUE, points=FALSE, cex=1.5))
  </code></pre>
  
  <p>However, I am unable to change the size of the label values. I have tried changing the argument <code>cex.axis</code> (within the <code>xlab</code> and <code>ylab</code> options), but this does not change the size of values along either the x- or the y-axes.</p>
  
  <p>Can anybody help?</p>
  
  <p>Thanks in advance,
  Mark</p>