?which.max should start you down the right path
Clint Bowman INTERNET: cl...@ecy.wa.gov
Air Quality Modeler INTERNET: cl...@math.utah.edu
Department of Ecology VOICE: (360) 407-6815
PO Box 47600 FAX: (360) 407-7534
Olympia, WA 98504-7600
USPS: PO Box 47600, Olympia, WA 98504-7600
Parcels: 300 Desmond Drive, Lacey, WA 98503-1274
On Fri, 1 Nov 2013, Gary Dong wrote:
Dear R users,
I wonder how I can use R to identify the max value of each row, the column
number column name:
For example:
a <- data.frame(x = rnorm(4), y = rnorm(4), z = rnorm(4))
a
x y z
1 -0.7289964 0.2194702 -2.4674780
2 1.0889353 0.3167629 -0.9208548
3 -0.6374692 -1.7249049 0.6567313
4 -0.1348642 0.4507473 -1.7309010
In this data frame, I compare y and z only.
What I need:
x y z
max max.col.num max.col.name
1 -0.7289964 0.2194702 -2.4674780 0.2194702 2
y
2 1.0889353 0.3167629 -0.9208548 0.3167629 2
y
3 -0.6374692 -1.7249049 0.6567313 0.6567313 3
z
4 -0.1348642 0.4507473 -1.7309010 0.4507473 2
y
Any suggestion will be greatly appreciated!
Thank you!
Gary
[[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.
