[R] getting cd_plot in vcd package to work with layout

[Uwe Ligges]

Lyndon Walker wrote:
> Hi,
> I'm trying to get 2x2 (or other layouts) of cd_plot from the vcd package.  I
> have tried the usual commands like layout, par(mfrow...) etc and but cd_plot
> seems to ignore them and send the plotting window back to 1x1.  I have also
> tried turning off the pop and newpage options in cd_plot but I still can't
> get multiple cd_plots into a plotting window.
> 
> Any suggestions would be greatly appreciated.

This is because cd_plot() uses the grid framework rather than the R base 
graphics system. Hence use it inside a grid viewport.

Example:

library("vcd")
pushViewport(vp <- viewport(x = 0.25, y = 0.5,
                w = 0.5, h = 1))
cd_plot(Improved ~ Age, data = Arthritis, newpage=FALSE)
popViewport()
pushViewport(vp <- viewport(x = 0.75, y = 0.5,
                w = 0.5, h = 1))
cd_plot(Improved ~ Age, data = Arthritis, newpage=FALSE)
popViewport()

Uwe Ligges





> cheers
> Lyndon
> 
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