[R] plot(table..) using pairs

[Phil]

I'm trying to visualise relationships between a number of categorical
variables with values 0 and 1. 

Plot(table(x,y))

 ..works well for one relationship, so I want to use this to examine all
relationships using pairs function. 

pairs(data_array, upper.panel=panel.tab)

where

panel.tab <- function (x,y)
 {
 plot(tables(x,y))
 }

..produces the error..

Error in pairs.default(a, upper.panel = panel.tab) : 
        The panel function made a new plot

Can anyone help..?? Many thanks

Phil.
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