title: Change the size of a plot when plotting multiple plots in R
body: <p>I want to know if there is a way to define the size of a plot in R, when you are plotting different plots using the par(mfrow=c()) function.</p>
  
  <p>As a simple example take this:</p>
  
  <pre><code>par(mfrow = c(3,1))
  plot(1:2)
  plot(1:2)
  plot(1:2)
  </code></pre>
  
  <p>All plots will have the same size.</p>
  
  <p>Is it possible, for instance, to make the size of the third plot different?
  For example make it half the size of the other plots?</p>
  
  <p>If I use this:</p>
  
  <pre><code>par(mfrow = c(3,1))
  plot(1:2)
  plot(1:2)
  plot(1:2, ylim =c(0,1))
  </code></pre>
  
  <p>The ylim axis changes but no the size of the plot.</p>
  
  <p>Thank you.</p>