useR's,
First, I would like to say thanks to John Fox for providing this segment of
code to perform intersection for multiple sets:
intersection <- function(x, y, ...){
if (missing(...)) intersect(x, y)
else intersect(x, intersection(y, ...))
}
I want to execute this function on the rows of a matrix I have:
Ik.mat.test <- matrix(c(2,3,6,1,2,6,6,1,2),byrow=T,nrow=3)
> Ik.mat.test
[,1] [,2] [,3]
[1,] 2 3 6
[2,] 1 2 6
[3,] 6 1 2
I need to find a way to run the intersection function on the rows of this
matrix. The result should be a vector containing 2, 6.
This works, but I want to find a way to do this for any size matrix.
intersection(Ik.mat.test[1,],Ik.mat.test[2,], Ik.mat.test[3,])
So, if the user supplied a matrix with any number of rows, I would like to
be able to run this function. Any ideas?
I have tried something like
do.call(intersection, list(Ik.mat.test[1,]: Ik.mat.test[3,]))
but this doesnt work
Thanks in advance.
Derek
--
View this message in context:
http://www.nabble.com/intersecting-rows-of-a-matrix-tp15601658p15601658.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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.
