R Under development (unstable) (2025-02-23 r87804 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.27.0 (2024-11-01 18:00:02 UTC) successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

R.utils v2.13.0 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

The following objects are masked from 'package:base':

    cat, commandArgs, getOption, isOpen, nullfile, parse, use, warnings

> 
> local({
+   dev.new()
+   on.exit(dev.off())
+   subplots(4)
+   for (kk in 1:4) plot(kk, main=kk)
+ })
> 
> 
> local({
+   dev.new()
+   on.exit(dev.off())
+   subplots(1:4)
+   for (kk in 1:4) plot(kk, main=kk)
+ })
dev.new(): using pdf(file="Rplots1.pdf")
> 
> local({
+   dev.new()
+   on.exit(dev.off())
+   subplots(4, nrow=2)
+   for (kk in 1:4) plot(kk, main=kk)
+ })
dev.new(): using pdf(file="Rplots2.pdf")
> 
> local({
+   dev.new()
+   on.exit(dev.off())
+   subplots(nrow=2, ncol=4)
+   for (kk in 1:4) plot(kk, main=kk)
+ })
dev.new(): using pdf(file="Rplots3.pdf")
> 
> proc.time()
   user  system elapsed 
   0.23    0.14    0.31