[R] plotting graph in different device

[Swanton0822]

Hi,
i try to plot my graph into different device using x11(),
but when i do this comes up:

> x11(print(plot(A5e$ECAB,A5e$EXPEND,type='p',main='Per capita expenditure
> against economic 
+ ability index without
outliners',xlab='ECAB',ylab='EXPEND',xlim=c(0,150),ylim=c(150,400),
+ col='red',col.axis='blue')))
NULL
Warning message:
‘length(width)’ differs between new and previous
         ==> NOT changing ‘width’ 
> 

anyone know how to solve that?
and what should i do if i want to plot 4 graphs into by opening 4 device in
R?
many thanks.
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