R Under development (unstable) (2023-11-16 r85542 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 v1.25.0 (2022-06-12 02:20:02 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 v2.12.3 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, warnings

> 
> # A progress bar with default step length one.
> pb <- ProgressBar(max=42)
> reset(pb)
[> while (!isDone(pb)) {
+   x <- rnorm(3e4)
+   increase(pb)
+   # Emulate a slow process
+   if (interactive()) Sys.sleep(0.02)
+ }
.........|.........|.........|.........|.]
> cat("\n")

> 
> # A "faster" progress bar with default step length 1.4.
> pb <- ProgressBar(max=42, stepLength=1.4)
> reset(pb)
[> while (!isDone(pb)) {
+   x <- rnorm(3e4)
+   increase(pb)
+   # Emulate a slow process
+   if (interactive()) Sys.sleep(0.02)
+ }
.........|.........|.........|.........|.]
> 
> cat("\n")

> 
> 
> ## Odds and ends
> print(pb)
[1] "ProgressBar: max=42, value=42"
> print(setStepLength(pb, 1L))
[1] 1.4
> print(setMaxValue(pb, 100L))
[1] 100
> print(setProgress(pb, 0.3))
[1] 0.42
> print(setTicks(pb, 10L))
[1]  0 10 20 30 40
> 
> 
> proc.time()
   user  system elapsed 
   0.60    0.15    0.68