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I have to plot grid in my plots. I have found one solution for this purpose

barplot(1:50)
grid()
box()
par(new = TRUE)
barplot(1:50)

And following is the plot enter image description here I am ok with it. But why I should call barplot twice. Is there some easy way to move grid to background ?

I have faced following problem is my plot (boxplot)

png("test2.png")
bm = boxplot(exuper, fuper, super, tuper, dat$uper, outline = F, names=names, panel.first = grid())
box()    
dev.off()

AND THE ERROR is

Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) : 
  plot.new has not been called yet
> box()
Error in box() : plot.new has not been called yet
Hafiz Muhammad Shafiq
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