[Rd] capture.output() duplicates last line unless newline (R-devel bug)
peter dalgaard
pdalgd at gmail.com
Fri Aug 14 11:30:50 CEST 2015
The fix for PR#16481 had a side effect involving capture.output(), so this may be transient, please recheck whether the issue has disappeared in the meantime.
-pd
On 14 Aug 2015, at 11:09 , Henrik Bengtsson <henrik.bengtsson at ucsf.edu> wrote:
> In R-devel (2015-08-12 r69024), capture.output() incorrectly
> duplicates the last line unless it ends with a newline. I don't see
> this in R 3.2.2 RC (2015-08-13 r69049). It seems to have started
> fairily recently; I spotted this yesterday after starting to get
> errors in my R.utils check that use capture.output(), cf.
> https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-debian-clang/R.utils-00check.html
>
> Examples:
>
>> x <- "a"
>> cat(x)
> a>
>> capture.output(cat(x))
> [1] "a" "a"
>
>> x <- "a\n"
>> cat(x)
> a
>> capture.output(cat(x))
> [1] "a"
>
>> x <- "a\nb"
>> cat(x)
> a
> b>
>> capture.output(cat(x))
> [1] "a" "b" "b"
>
>> x <- "a\nb\n"
>> cat(x)
> a
> b
>> capture.output(cat(x))
> [1] "a" "b"
>
>> capture.output(cat(x))
> [1] "a" "b"
>> x <- c("a", "b")
>> cat(x)
> a b>
>> capture.output(cat(x))
> [1] "a b" "a b"
>
>> x <- c("a", "b\n")
>> cat(x)
> a b
>> capture.output(cat(x))
> [1] "a b"
>
>
>> sessionInfo()
> R Under development (unstable) (2015-08-12 r69024)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
> Running under: Windows 7 x64 (build 7601) Service Pack 1
>
> locale:
> [1] LC_COLLATE=English_United States.1252
> [2] LC_CTYPE=English_United States.1252
> [3] LC_MONETARY=English_United States.1252
> [4] LC_NUMERIC=C
> [5] LC_TIME=English_United States.1252
>
> attached base packages:
> [1] stats graphics grDevices utils datasets methods base
>
> other attached packages:
> [1] R.utils_2.1.0-9000 R.oo_1.19.0-9000 R.methodsS3_1.7.0-9000
>
> loaded via a namespace (and not attached):
> [1] tools_3.3.0
>
> /Henrik
>
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--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com
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