[R] selection of character

2007-04-04 Thread Leonardo Lami 
Hi all,

I have a simple question:
I have a character vector like this

 [1] 10_1 1_1  11_1 2_1  3_1  4_1  5_1  6_1  7_1  8_1
[11] 9_1  1_3  2_3  3_3  4_3  1_4  2_4  3_4  4_4  5_4
[21] 6_4  7_4  1_5  2_5  10_6 11_6 12_6 1_6  2_6  3_6
[31] 4_6  5_6  6_6  7_6  8_6  9_6  1_7  1_8  2_8  3_8
[41] 10_9 1_9  2_9  3_9  4_9  5_9  6_9  7_9  8_9  9_9
[43]  1_10 2_10

and I'd like to have a vector with only the value after the under scor,
like this:

 [1] 1 1  1 1  1  1  1  1  1  1
[11] 1  3  3  3  3  4  4  4  4  4
[21] 4  4  5  5  6 6 6 6  6  6
[31] 6  6  6  6  6  6  7  8  8  8
[41] 9 9  9  9  9  9  9  9  9  9
[43]  10 10

Is there a simple function to do this?

Thank you for your help
All the best

Leonardo

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Re: [R] selection of character

2007-04-04 Thread Dimitris Rizopoulos 
one way is the following:

x - c(10_1, 1_1, 11_1, 2_1, 3_1, 4_1,
5_1, 6_1, 7_1, 8_1)
#
sapply(strsplit(x, _), [, 2)


I hope it helps.

Best,
Dimitris


Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
 http://www.student.kuleuven.be/~m0390867/dimitris.htm


- Original Message - 
From: Leonardo Lami [EMAIL PROTECTED]
To: r-help@stat.math.ethz.ch
Sent: Wednesday, April 04, 2007 4:11 PM
Subject: [R] selection of character


 Hi all,

 I have a simple question:
 I have a character vector like this

 [1] 10_1 1_1  11_1 2_1  3_1  4_1  5_1  6_1  7_1 
 8_1
 [11] 9_1  1_3  2_3  3_3  4_3  1_4  2_4  3_4  4_4 
 5_4
 [21] 6_4  7_4  1_5  2_5  10_6 11_6 12_6 1_6  2_6 
 3_6
 [31] 4_6  5_6  6_6  7_6  8_6  9_6  1_7  1_8  2_8 
 3_8
 [41] 10_9 1_9  2_9  3_9  4_9  5_9  6_9  7_9  8_9 
 9_9
 [43]  1_10 2_10

 and I'd like to have a vector with only the value after the under 
 scor,
 like this:

 [1] 1 1  1 1  1  1  1  1  1  1
 [11] 1  3  3  3  3  4  4  4  4  4
 [21] 4  4  5  5  6 6 6 6  6  6
 [31] 6  6  6  6  6  6  7  8  8  8
 [41] 9 9  9  9  9  9  9  9  9  9
 [43]  10 10

 Is there a simple function to do this?

 Thank you for your help
 All the best

 Leonardo

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 http://www.R-project.org/posting-guide.html
 and provide commented, minimal, self-contained, reproducible code.
 


Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

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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.

Re: [R] selection of character

2007-04-04 Thread Julien Barnier 
Another way, with regexps :

gsub(.*_, , x)

HTH,

-- 
Julien

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