Re: [Rd] rm() deletes 'c' if c('a','b') is the argument (PR#9399)

From: Steven McKinney <smckinney_at_bccrc.ca>
Date: Wed 29 Nov 2006 - 18:44:35 GMT

Same behaviour seen on Apple Mac OSX 10.4.8 platform:

> sessionInfo()

R version 2.4.0 Patched (2006-10-31 r39758) powerpc-apple-darwin8.8.0

locale:
en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8

attached base packages:
[1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" "base"

other attached packages:

    XML
"1.2-0"
>
> ls()

[1] "getMonograph" "last.warning" "myfun"
> a <- 1
> b <- 2
> c <- letters
> a

[1] 1
> b

[1] 2
> c

 [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z"
> rm(c('a', 'b'))
> a
Error: object "a" not found
> b

Error: object "b" not found
> c

.Primitive("c")
> ls()

[1] "getMonograph" "last.warning" "myfun"
> a <- 1
> b <- 2
> d <- letters
> ls()
[1] "a" "b" "d" "getMonograph" "last.warning" "myfun"

> rm(c('a', 'b'))
Warning message:
remove: variable "c" was not found

> ls()

[1] "d" "getMonograph" "last.warning" "myfun"
>

Steven McKinney

Statistician
Molecular Oncology and Breast Cancer Program British Columbia Cancer Research Centre

email: smckinney@bccrc.ca

tel: 604-675-8000 x7561

BCCRC
Molecular Oncology
675 West 10th Ave, Floor 4
Vancouver B.C.
V5Z 1L3
Canada

-----Original Message-----
From: r-devel-bounces@r-project.org on behalf of hanl2@wyeth.com Sent: Wed 11/29/2006 10:35 AM
To: r-devel@stat.math.ethz.ch
Cc: R-bugs@biostat.ku.dk
Subject: [Rd] rm() deletes 'c' if c('a','b') is the argument (PR#9399)  

Full_Name: Lixin Han
Version: 2.4.0
OS: Windows 2000
Submission from: (NULL) (155.94.110.222)

A character vector c('a','b') is supplied to rm(). As a result, 'c' is deleted unintentionally.

> a <- 1:5
> b <- 'abc'
> c <- letters
> ls()
[1] "a" "b" "c"
> rm(c('a','b'))
> ls()
character(0)
>



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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu Nov 30 13:52:41 2006

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