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combining column having same values

4 messages · Eliza Botto, ONKELINX, Thierry, arun +1 more

Original
ONKELINX, Thierry
# 
Dear Eliza,

You question is not very clear. I think you are looking for the which() function.

Best regards,

Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens eliza botto
Verzonden: woensdag 6 maart 2013 12:26
Aan: r-help at r-project.org
Onderwerp: [R] combining column having same values


Dear useRs,
I have a matrix in the following form

 [,1]   [,2]   [,3]   [,4]   [,5]   [,6]   [,7]   [,8]   [,9]  [,10]  [,11]      1      1       3      2       3       1      1       2      3       3      2

and following is my desired output  (combining the column headers, having same values).
a<-1,2,6,7

b<-3,5,9,10

c<-4,8,11
Thanks in advance
Elisa

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arun
# 
Hi,
Try this:
mat1<- as.matrix(read.table(text=" 
1????? 1????? 3????? 2????? 3????? 1????? 1????? 2????? 3????? 3????? 2
",sep="",header=FALSE))
?res<-lapply(1:3,function(i) which(mat1==i))
?names(res)<- c("a","c","b")
?res
#$a
#[1] 1 2 6 7

#$c
#[1]? 4? 8 11

#$b
#[1]? 3? 5? 9 10
A.K.




----- Original Message -----
From: eliza botto <eliza_botto at hotmail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Wednesday, March 6, 2013 6:26 AM
Subject: [R] combining column having same values


Dear useRs,
I have a matrix in the following form

[,1]?  [,2]?  [,3]?  [,4]?  [,5]?  [,6]?  [,7]?  [,8]?  [,9]? [,10]? [,11]? ? ? 1? ? ? 1? ? ?  3? ? ? 2? ? ?  3? ? ?  1? ? ? 1? ? ?  2? ? ? 3? ? ?  3? ? ? 2

and following is my desired output? (combining the column headers, having same values).
a<-1,2,6,7

b<-3,5,9,10

c<-4,8,11
Thanks in advance
Elisa ??? ???  ??? ?  ??? ??? ? 
??? [[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.
Rui Barradas
# 
Hello,

Try

x <- scan(text = " 1      1       3      2       3       1      1 
2      3       3      2")
sapply(unique(x), function(.x) which(x == .x))


Hope this helps,

Rui Barradas

Em 06-03-2013 11:26, eliza botto escreveu: