Re: [R] regexpr mystery can not remove trailing spaces

From: jim holtman <jholtman_at_gmail.com>
Date: Wed, 02 Jun 2010 09:44:42 -0400

You had the wrong case on 'w' and the wrong expression with [:space:]'; see below

> bbb <- c("02.06.10 12:40 ", "02.06.10 12:00 ", "02.06.10 11:00 ",

+ "02.06.10 10:00   ", "02.06.10 09:00   ", "02.06.10 08:00   ",
+ "02.06.10 07:00   ", "02.06.10 06:00   ", "02.06.10 05:00   ",
+ "02.06.10 04:00   ", "02.06.10 03:00   ", "02.06.10 02:00   ",
+ "02.06.10 01:00   ", "02.06.10 00:00   ", "01.06.10 23:00   ",
+ "01.06.10 22:00   ", "01.06.10 21:00   ", "01.06.10 20:00   ",
+ "01.06.10 19:00   ", "01.06.10 18:00   ", "01.06.10 17:00   ",
+ "01.06.10 16:00   ", "01.06.10 15:00   ", "01.06.10 14:00   ",
+ "01.06.10 13:00   ", "01.06.10 05:00   ", "31.05.10 05:00   ",
+ "30.05.10 05:00   ", "29.05.10 05:00   ", "28.05.10 05:00   ",
+ "27.05.10 05:00   ")

> sub('\\W+$', '', bbb[1])
[1] "02.06.10 12:40"
> sub('[[:space:]]+$', '', bbb[1])
[1] "02.06.10 12:40"
>

On Wed, Jun 2, 2010 at 9:22 AM, Petr PIKAL <petr.pikal_at_precheza.cz> wrote:
> Hi
>
>> dput(bbb)
> c("02.06.10 12:40   ", "02.06.10 12:00   ", "02.06.10 11:00   ",
> "02.06.10 10:00   ", "02.06.10 09:00   ", "02.06.10 08:00   ",
> "02.06.10 07:00   ", "02.06.10 06:00   ", "02.06.10 05:00   ",
> "02.06.10 04:00   ", "02.06.10 03:00   ", "02.06.10 02:00   ",
> "02.06.10 01:00   ", "02.06.10 00:00   ", "01.06.10 23:00   ",
> "01.06.10 22:00   ", "01.06.10 21:00   ", "01.06.10 20:00   ",
> "01.06.10 19:00   ", "01.06.10 18:00   ", "01.06.10 17:00   ",
> "01.06.10 16:00   ", "01.06.10 15:00   ", "01.06.10 14:00   ",
> "01.06.10 13:00   ", "01.06.10 05:00   ", "31.05.10 05:00   ",
> "30.05.10 05:00   ", "29.05.10 05:00   ", "28.05.10 05:00   ",
> "27.05.10 05:00   ")
>>
>
> For simplicity I change the name and put it to single variable.
> I also reinstalled R to recent R-devel
>
>> sub('\\w+$', '', bbb[1])
> [1] "02.06.10 12:40   "
>> sub('[:space:]', '', bbb[1])
> [1] "02.06.10 1240   "
>>
>
> I also tried Matt's suggestion but it did not help.
>
> Regards
> Petr
>
> Joris Meys <jorismeys_at_gmail.com> napsal dne 02.06.2010 14:35:19:
>
>> Could you provide us with dput(becva$V1[1])?
>> Cheers
>> Joris
>
>> On Wed, Jun 2, 2010 at 2:07 PM, Petr PIKAL <petr.pikal_at_precheza.cz>
> wrote:
>> Dear all
>>
>> I encountered strange problem with regexpr replacement
>>
>> I made this character object
>>
>> str <- "02.06.10 12:40     "
>>
>> > str(str)
>>  chr "02.06.10 12:40      "
>>
>> I read in an object which seems to be quite similar
>>
>> > str(as.character(becva$V1)[1])
>>  chr "02.06.10 12:40   "
>>
>> However I can not remove trailing spaces from it
>>
>> > sub(' +$', '', as.character(becva$V1[1]))
>>
>> [1] "02.06.10 12:40   "
>> > sub(' +$', '', str)
>> [1] "02.06.10 12:40"
>> >
>>
>> Do somebody have an idea what to do?
>>
>> $version.string
>> [1] "R version 2.12.0 Under development (unstable) (2010-04-25 r51820)"
>>
>> on Windows
>>
>> Regards
>> Petr
>>
>> ______________________________________________
>> R-help_at_r-project.org mailing list
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>> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
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>>
>>
>>
>> --
>> Joris Meys
>> Statistical Consultant
>>
>> Ghent University
>> Faculty of Bioscience Engineering
>> Department of Applied mathematics, biometrics and process control
>>
>> Coupure Links 653
>> B-9000 Gent
>>
>> tel : +32 9 264 59 87
>> Joris.Meys_at_Ugent.be
>> -------------------------------
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>
> ______________________________________________
> R-help_at_r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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Received on Wed 02 Jun 2010 - 13:52:44 GMT

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