title: Creating umbrella titles for aligned graphs in R
body: <p>I have succeeded in creating and aligning three scatter-plots in R, using the following code:</p>
  
  <pre><code>par(mfrow = c(3,1))
  
  plot(CGP.GOSL ~ FPT.MAF.GOSL, data = all.locs, main = "A. Place I")
    abline(h=c(0.5))
    abline(v=c(0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5), lty=2)
  plot(CGP.IRE ~ FPT.MAF.IRE, data = all.locs, main = "B. Place II")
    abline(h=c(0.5))
    abline(v=c(0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5), lty=2)
  plot(CGP.BAR ~ FPT.MAF.BAR, data = all.locs, main = "C. Place III")
    abline(h=c(0.5))
    abline(v=c(0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5), lty=2)
  </code></pre>
  
  <p>What I would like to do now is save space by having a single Axis label for the x and y axis. I have tried experimenting with the par() function, inserting x and ylab functions, but it seems that as these are not graphical parameters is will not accept them. I suspect the problem lies in where I place this information in the code, as using the xlab and ylab seems to make sense, and I can write x and ylab = "" in the individual plot codes. </p>
  
  <p>I am also struggling to change the position of the main titles so that the appear on the left, to remove the values from the x-axis so that they only show at the bottom of the whole figure, and to arrange the figure so that there is less space.</p>
  
  <p>This figure shows the current layout and the layout I want to achieve:
  <a href="https://i.stack.imgur.com/5fvIi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5fvIi.png" alt="Before and after"></a></p>
  
  <p>I am sorry to post so many questions at once. I am very new to R and programming am still finding the helpfiles a bit daunting, although I am getting there. Some suggestions on functions, where to put them and how to use them to achieve some of these aims would be great. </p>