Re: [R] regular expression in gsub() for strings with leading backslash

From: Miao <glycob_at_gmail.com>
Date: Fri, 29 Apr 2011 18:34:24 -0700

Thanks Duncan for clarifying this. I'm pretty a newbie to such type of characters and special characters. In R's gsub() what regular expressions shall I use to handle all these situations?

On Fri, Apr 29, 2011 at 6:07 PM, Duncan Murdoch <murdoch.duncan_at_gmail.com>wrote:

> On 29/04/2011 7:41 PM, Miao wrote:
>
>> Hello,
>>
>> Can anyone help on gsub() in R? I have a string like something below, and
>> wanted to delete all the strings with leading backslash, including
>> "\xa0On",
>> "\023, "\xab", and many others. How should I write a regular expression
>> pattern in gsub()? I don't care how many characters following backslash.
>>
>
>
> If those are R strings, none of them contain a backslash. In R, a
> backslash would always be printed as \\.
>
> \x is the introduction to a hexadecimal encoding for a character; the next
> two characters show the hex digits. So your first string contains a single
> character \xa0, the third one contains \xab, and so on.
>
> The \023 is an octal encoding for a single character.
>
> Duncan Murdoch
>
>
>
>> txt<- "Is This Thing\xa0On? http://bit.ly/jAbKem wait \023 for people
>> \xab
>> and be patient :"
>>
>> Thanks in advance,
>> Miao
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help_at_r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>

-- 
proceed everyday

	[[alternative HTML version deleted]]

______________________________________________
R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Received on Sat 30 Apr 2011 - 01:40:24 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sat 30 Apr 2011 - 02:00:36 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive