On Wed, 2011-07-20 at 23:38 +1200, Rolf Turner wrote:
> On 20/07/11 11:07, DrCJones wrote:
> > Hi,
> >
> > par(mfrow = c(2,2))
> >
> > will create a 2x2 window that I can use to plot 4 diferent figures in:
> > [plot1 plot2]
> > [plot3 plot4]
> >
> > But how can do 3 so that the bottom spans the width of the upper two:
> >
> > [plot1 plot1]
> > [p l o t 3]
> >
> > Is this possible in R?
>
> In R ***anything*** is possible. :-)
>
> Your requirement is no only possible, but easy!
>
> See ?layout
>
> You may have to expend a bit of effort to understand the syntax, but
> that will be good for your karma. :-)
It may help the OP to think of the layout as a 2*2 matrix:
1 2
3 4
say, with plot 3 using regions 3 and 4. If we fill the same matrix with
the plot number we want to draw in it, we have
1 2
3 3
>From there it is easy to specify the layout by directly building that
matrix in R:
> (m <- matrix(c(1:3,3), ncol = 2, byrow = TRUE))
[,1] [,2]
[1,] 1 2
[2,] 3 3
and pass that to `layout()`
layout(m)
## invisible() just to stop replicate returning something visible
invisible(replicate(3, plot(1:10)))
layout(1)
HTH
G
> It ***will*** do exactly what you
> want, if you ask it nicely.
>
> cheers,
>
> Rolf Turner
>
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Dr. Gavin Simpson [t] +44 (0)20 7679 0522
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