[R] Axis label spanning multiple plots

[Andre Nathan]

On Mon, 2009-06-01 at 22:24 +0200, baptiste auguie wrote:
> you can use title() with the sub argument,
> 
> title(sub="x label", outer=T) # you might want to play around with  
> line argument

Can title() span two plots? I'm trying to use a single title for two
plots, something like

    +------------+
  t |            |
    |            |
  i |            |
    +------------+
  t
    +------------+
  l |            |
    |            |
  e |            |
    +------------+


Thanks,
Andre