R Under development (unstable) (2024-01-23 r85822 ucrt) -- "Unsuffered Consequences"
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> source("incl/start.R")
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 v1.26.0 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.filesets v2.15.1 successfully loaded. See ?R.filesets for help.

Attaching package: 'R.filesets'

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

    append, readLines

> 
> message("*** readDataFrame()")
*** readDataFrame()
> 
> path <- system.file("exData", "dataSetA,original", package="R.filesets")
> pathnames <- list.files(path=path, pattern="[.]txt$", full.names=TRUE)
> pathname <- pathnames[1]
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Basic reading
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> data <- readDataFrame(pathname)
> print(data)
   x  y fac char
1  1  3   D    r
2  2  2   A    b
3  2  6   D    g
4  1  7   B    q
5  3 10   B    f
6  1  2   B    a
7  2 24   E    g
8  1  4   E    d
9  1  1   G    g
10 1  2   A    j
> 
> data <- readDataFrame(basename(pathname), path=dirname(pathname))
> print(data)
   x  y fac char
1  1  3   D    r
2  2  2   A    b
3  2  6   D    g
4  1  7   B    q
5  3 10   B    f
6  1  2   B    a
7  2 24   E    g
8  1  4   E    d
9  1  1   G    g
10 1  2   A    j
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Reading gzip'ed file
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> pathT <- tempdir()
> pathnameZ <- file.path(pathT, sprintf("%s.gz", basename(pathname)))
> R.utils::gzip(pathname, pathnameZ, remove=FALSE)
> dataZ <- readDataFrame(pathnameZ)
> print(dataZ)
   x  y fac char
1  1  3   D    r
2  2  2   A    b
3  2  6   D    g
4  1  7   B    q
5  3 10   B    f
6  1  2   B    a
7  2 24   E    g
8  1  4   E    d
9  1  1   G    g
10 1  2   A    j
> 
> ## Validate
> stopifnot(identical(dataZ, data))
> 
> ## Cleanup
> file.remove(pathnameZ)
[1] TRUE
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Reading multiple files and stack them
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> pathnames <- rep(pathname, times=3L)
> data <- readDataFrame(pathnames)
> print(data)
   x  y fac char
1  1  3   D    r
2  2  2   A    b
3  2  6   D    g
4  1  7   B    q
5  3 10   B    f
6  1  2   B    a
7  2 24   E    g
8  1  4   E    d
9  1  1   G    g
10 1  2   A    j
11 1  3   D    r
12 2  2   A    b
13 2  6   D    g
14 1  7   B    q
15 3 10   B    f
16 1  2   B    a
17 2 24   E    g
18 1  4   E    d
19 1  1   G    g
20 1  2   A    j
21 1  3   D    r
22 2  2   A    b
23 2  6   D    g
24 1  7   B    q
25 3 10   B    f
26 1  2   B    a
27 2 24   E    g
28 1  4   E    d
29 1  1   G    g
30 1  2   A    j
> 
> source("incl/end.R")
> 
> proc.time()
   user  system elapsed 
   3.35   25.10   29.17