title: Increasing resolutions of pdf graphics in R
body: <p>If I'm creating pdf figures in R, is there an input argument analogous to res (for png) that I can use to increase the resolution from the default in the following:</p>
  
  <pre><code>pdf("Dsr_2b.pdf")
  hist(Dsr,breaks=200,xlim=c(-0.03,0.03),main="Figure 2b: Dsr")
  dev.off()
  </code></pre>
  
  <p>Nothing I saw in the documentation seemed to be geared to this.</p>