
attach(mtcars)
layout(matrix(c(1,1,2,3),2,2,byrow=TRUE),widths=c(3,1),heights=c(1,2))
hist(wt)
hist(mpg)
hist(disp)
detach(mtcars)

attach(mtcars)
layout(matrix(c(1,1,2,3),2,2,byrow=TRUE))
hist(wt)
hist(mpg)
hist(disp)
detach(mtcar)
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