Hi all,
I use txtProgressBar to monitor progress of large computations. What I
miss is the ability to redirect the progress bar to a stream other than
stdout, specifically to the message stream. This would be useful for
running Sweave scripts: When redirected to stderr, the bar could be
visible even though console output is diverted to the output file (and
there would be no cluttering of the generated latex).
I'd suggest the following changes to txtProgressBar:
- a new argument 'file' (compare to 'cat') which defaults to stderr()
(there might be reasons to use stdout(), but I believe a progress bar is
mostly intended as a diagnostic tool and not for console output, which
is printed or saved in some cases).
- the calls to 'cat' that update the progress bar get 'file = file' as
additional argument so that output is redirected as desired.
In case anyone from the core team is willing to incorparate this idea, I
attached the patch file for the necessary changes below.
Best regards,
Andreas
3c3
< width = NA, title, label, style = 1)
---
> width = NA, title, label, style = 1, file=stderr())
23c23
< cat(paste(rep.int(char, nb-.nb), collapse=""))
---
> cat(paste(rep.int(char, nb-.nb), collapse=""), file = file)
27c27
< "\r", paste(rep.int(char, nb), collapse=""), sep = "")
---
> "\r", paste(rep.int(char, nb), collapse=""), sep =
"", file = file)
38c38
< cat("\r", paste(rep.int(char, nb), collapse=""), sep = "")
---
> cat("\r", paste(rep.int(char, nb), collapse=""), sep =
"", file = file)
42c42
< "\r", paste(rep.int(char, nb), collapse=""), sep = "")
---
> "\r", paste(rep.int(char, nb), collapse=""), sep =
"", file = file)
54c54
< cat(paste(c("\r |", rep.int(" ", nw*width+6)), collapse=""))
---
> cat(paste(c("\r |", rep.int(" ", nw*width+6)), collapse=""),
file = file)
59c59
< ), collapse=""))
---
> ), collapse=""), file = file)
68c68
< cat("\n")
---
> cat("\n", file = file)
--
Andreas Borg
Medizinische Informatik
UNIVERSITÄTSMEDIZIN
der Johannes Gutenberg-Universität
Institut für Medizinische Biometrie, Epidemiologie und Informatik
Obere Zahlbacher Straße 69, 55131 Mainz
www.imbei.uni-mainz.de
Telefon +49 (0) 6131 175062
E-Mail: b...@imbei.uni-mainz.de
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