[R] unexpected (?) behavior of box()

[Jim Lemon]

Hi Ani,
Blame Mercator. Maps draws an approximately 2x1 plot. Maybe this:

mappar<-par("usr")
rect(mappar[1],mappar[3],mappar[2],mappar[4])

Jim

On Fri, Jan 7, 2022 at 6:25 PM ani jaya <gaaauul using gmail.com> wrote:
>
> Dear R expert,
>
> I try to box a figure using box(). However it box the default margin,
> not the specified margin.
>
> #working as expected
> barplot(1:20)
> box()
>
> #working as expected, the box follow the margin
> par(mar=c(2, 6, 5, 4))
> barplot(1:20)
> box()
>
> #not working
> install.packages("maps")
> library(maps)
> par(mar=c(2, 6, 5, 4))
> m<-map('world', xlim = c(91, 142), ylim = c(25, 40),
>        lwd=1.5, col = "grey",border=NA, fill = T,  bg="white")
> box()
>
> #the turnaround
> par(mar=c(2, 6, 5, 4))
> m<-map('world', xlim = c(91, 142), ylim = c(25, 40),
>        lwd=1.5, col = "grey",border=NA, fill = T,  bg="white")
> par(mar=c(2, 6, 5, 4))
> box()
>
> I just curious with this behavior. Is it the problem with the package
> "map" or box() function?
> Thank you.
>
> > sessionInfo()
> R version 4.0.2 (2020-06-22)
> Platform: i386-w64-mingw32/i386 (32-bit)
> Running under: Windows 10 x64 (build 19043)
>
>
>
> Ani
>
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