title: Margins between plots in grid.arrange
body: <p>I dont seem to be able to find a solution as to how to increase the space between two plots with grid.arrange. I find no clue as to how to proceed. I dont want to change the size of the plots or anything like that. </p>
  
  <pre><code>grid.arrange(plot1, plot2, ncol=2)
  </code></pre>
  
  <p>(The stuff below was added later):</p>
  
  <p>This is the code that I have:</p>
  
  <p>x11()</p>
  
  <pre><code>cs &lt;- grid.arrange(arrangeGrob(b, a, ncol=2, top = textGrob(
                      "B", vjust = 0.5, hjust = 19.5, gp = gpar(
                       fontface = "bold", cex = 1.5)),
                       left = textGrob(~ Delta * "SCR (p - d)" ~ mu * 'S', 
                       gp=gpar(fontsize=18), rot = 90, vjust = 1)))
  soc_sph &lt;- grid.arrange(arrangeGrob(p, g, ncol=2, top = textGrob(
                       "A", vjust = 0.5, hjust = 19.5, gp = gpar(
                       fontface = "bold", cex = 1.5)),
                       left = textGrob(~ Delta * "SCR (p - d)" ~ mu * 'S', 
                       gp=gpar(fontsize=18), rot = 90, vjust = 1)))
  
  grid.arrange(soc_sph, cs, ncol=2)
  </code></pre>
  
  <p>So it is in this last grid.arrange, the space between soc_sph and cs that is to be increased. </p>