Thank you all for the suggestions, fantastic!
________________________________
From: Rui Barradas <ruipbarra...@sapo.pt>
Cc: "r-help@r-project.org" <r-help@r-project.org>
Sent: Thursday, January 10, 2013 10:32 AM
Subject: Re: [R] sort matrix based on a specific order
Hello,
Try the following. order() gives you a permutation of the vector
'ind' and to order that permutation gives its inverse.
mat <- cbind(c('w','x','y','z'),c('a','b','c','d'))
ind <- c('c','b','d','a')
ord <- order(ind)
mat[order(ord), ]
Hope this helps,
Rui Barradas
Em 10-01-2013 18:21, array chip escreveu:
Hi I have a character matrix with 2 columns A and B, If I want to sort the
matrix based on the column B, but based on a specific order of characters:
mat<-cbind(c('w','x','y','z'),c('a','b','c','d'))
ind<-c('c','b','d','a') I want "mat" to be sorted by the sequence in "ind":
[,1] [,2]
[1,] "y" "c"
[2,] "x" "b"
[3,] "z" "d"
[4,] "w" "a" Is there any simple function that can do this? Thanks John
[[alternative HTML version deleted]]
>
>
>______________________________________________ R-help@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.
[[alternative HTML version deleted]]
______________________________________________
R-help@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.
