HI,
You could try this:
library(reshape2)
dcast(melt(tutu,"nam"),nam~value,length)
# nam art deb joy mar seb lio nem tat
#1 da 2 3 1 4 1 1 0 0
#2 fr 2 2 2 3 0 1 1 1
#3 ya 1 2 1 0 0 1 1 0
A.K.
----- Original Message -----
From: Biau David <djmb...@yahoo.fr>
To: r help list <r-help@r-project.org>
Cc:
Sent: Friday, January 11, 2013 5:54 AM
Subject: [R] count combined occurrences of categories
Dear all,
i would like to count the number of times where I have combined occurrences of
the categories of 2 variables.
For instance, in the dataframe below, i would like to know how many times each
author (au1, au2, au3 represent the first, second, third author) is associated
with each of the category of the variable 'nam'. The position of the author
does not matter.
nam <- c('da', 'ya', 'da', 'da', 'fr', 'fr', 'fr', 'da', 'ya', 'fr')
au1 <- c('deb', 'art', 'deb', 'seb', 'deb', 'deb', 'mar', 'mar', 'joy', 'joy')
au2 <- c('art', 'deb', 'mar', 'deb', 'joy', 'mar', 'art', 'lio', 'nem', 'mar')
au3 <- c('mar', 'lio', 'joy', 'mar', 'art', 'lio', 'nem', 'art', 'deb', 'tat')
tutu <- data.frame(cbind(nam, au1, au2, au3))
thanks,
David
[[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.
______________________________________________
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.
