title: Plotting figures using 'par(mfrow=c())' in R
body: <p>I have 3 figures of which I would like to plot in the same place in R. I would like to have 2 columns, which would make the 3rd figure plotted alone in the second row. Using <code>par(mfrow=c(2,2))</code> functions in R, is there a way to have the bottom figure plotted in the centre of the plot, as opposed to underneath the top figure?   </p>