R devel - Sep 2005 - bug in gsub with perl=TRUE (PR#8164)

Full_Name: Richard Mott
Version: 2.0.1
OS: Linux toad 2.6.9 #4 SMP Mon Feb 21 16:20:16 GMT 2005 x86_64 AMD Opteron(tm)
Processor 848 AuthenticAMD GNU/Linux
Submission from: (NULL) (129.67.46.247)


gsub with perl=TRUE does not work properly. It pads/truncates the resulting
string to
the length of the input string: 

my.formula <- "log10(Biochem.ALP)^2+1 ~ Family + GENDER"
> gsub("^.+~", "transformed.y ~", my.formula )
[1] "transformed.y ~ Family + GENDER"
> gsub("^.+~", "transformed.y ~", my.formula, perl=TRUE )
[1] "transformed.y ~ Family + GENDER\0\006\0\0\r\377\0\0\0"  # padded

 my.formula <- "Biochem.ALP ~ Family +
GENDER"
> gsub("^.+~", "transformed.y ~", my.formula, perl=TRUE )
[1] "transformed.y ~ Family + GEND"  #
truncated
> gsub("^.+~", "transformed.y ~", my.formula )
[1] "transformed.y ~ Family + GENDER"

Richard.Mott at well.ox.ac.uk wrote:
> Full_Name: Richard Mott
> Version: 2.0.1
This version is completely outdated.
Please try with a *recent* version of R when reporting bugs, in this 
case R-2.2.0 beta (or in worst case R-2.1.1, the current release).

The bug reported below has been fixed some months ago ...

Uwe Ligges
> OS: Linux toad 2.6.9 #4 SMP Mon Feb 21 16:20:16 GMT 2005 x86_64 AMD
Opteron(tm) Processor 848 AuthenticAMD GNU/Linux
> Submission from: (NULL) (129.67.46.247)
> 
> 
> gsub with perl=TRUE does not work properly. It pads/truncates the resulting
> string to
> the length of the input string: 
> 
> my.formula <- "log10(Biochem.ALP)^2+1 ~ Family + GENDER"
> 
> 
>>gsub("^.+~", "transformed.y ~", my.formula )
> 
> [1] "transformed.y ~ Family + GENDER"
> 
> 
>>gsub("^.+~", "transformed.y ~", my.formula,
perl=TRUE )
> 
> [1] "transformed.y ~ Family + GENDER\0\006\0\0\r\377\0\0\0"  #
padded
> 
>  my.formula <- "Biochem.ALP ~ Family + GENDER"
> 
>>gsub("^.+~", "transformed.y ~", my.formula,
perl=TRUE )
> 
> [1] "transformed.y ~ Family + GEND"  # truncated
> 
>>gsub("^.+~", "transformed.y ~", my.formula )
> 
> [1] "transformed.y ~ Family + GENDER"
> 
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