request: How to get column name
r-help-bounces at r-project.org napsal dne 03.09.2008 15:54:08:
try this: x <- c(3,3,3,3,0,0,0,0,5,5,5,5,8,8,8,8) x <- matrix(x, nrow=4) which(colSums(x == 0) == nrow(x))
Isn't this the same? which(colSums(x)==0) Regards Petr
I hope it helps. Best, Dimitris Muhammad Azam wrote:
Dear R community I have a problem regarding which of the column in a matrix contains
all of
zero elements. e.g.
x=c(3,3,3,3,0,0,0,0,5,5,5,5,8,8,8,8); x=matrix(x, nrow=4) the output is
x
[,1] [,2] [,3] [,4] [1,] 3 0 5 8 [2,] 3 0 5 8 [3,] 3 0 5 8 [4,] 3 0 5 8 In this case the required column is second so the result should be
"2". How
can i get it?
best regards Muhammad Azam [[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.
-- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043399 Fax: +31/(0)10/7044657
______________________________________________ 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.