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

[PIKAL Petr]

Hi.

Why do you consider it unexpected?

see

map(database = "world", regions = ".", exact = FALSE, boundary = TRUE,
  interior = TRUE, projection = "", parameters = NULL, orientation = NULL,
  fill = FALSE, col = 1, plot = TRUE, add = FALSE, namesonly = FALSE,
  xlim = NULL, ylim = NULL, wrap = FALSE, resolution = if (plot) 1 else 0,
  type = "l", bg = par("bg"), mar = c(4.1, 4.1, par("mar")[3], 0.1),
  myborder = 0.01, namefield="name", lforce="n", ...)

map function redefines mar so your first par is probably changed during
plotting map and after you define it again box use new mar values.

Cheers
Petr

> -----Original Message-----
> From: R-help <r-help-bounces using r-project.org> On Behalf Of ani jaya
> Sent: Friday, January 7, 2022 8:25 AM
> To: r-help <r-help using r-project.org>
> Subject: [R] unexpected (?) behavior of box()
> 
> 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
> 
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.