Hello -- Given the 10x2 matrix below, my goal is to create a vector
which contains the maximum of column 1 and column 2, or the only value
if there is an NA in one column. I experimented with max.col without
success. Thanks. --Dale
> > tmax.m
tmaxhme tmaxer
[1,] 101.0 99.8
[2,] 102.5 99.0
[3,] 100.6 98.4
[4,] NA 100.5
[5,] 101.0 99.4
[6,] NA 97.6
[7,] NA 99.0
[8,] 99.0 98.4
[9,] NA 98.5
[10,] NA 99.1
Try this: pmax(tmax.m[,1], tmax.m[,2], na.rm = TRUE) On 5/10/06, Dale Steele <Dale_Steele at brown.edu> wrote:> Hello -- Given the 10x2 matrix below, my goal is to create a vector > which contains the maximum of column 1 and column 2, or the only value > if there is an NA in one column. I experimented with max.col without > success. Thanks. --Dale > > > > tmax.m > tmaxhme tmaxer > [1,] 101.0 99.8 > [2,] 102.5 99.0 > [3,] 100.6 98.4 > [4,] NA 100.5 > [5,] 101.0 99.4 > [6,] NA 97.6 > [7,] NA 99.0 > [8,] 99.0 98.4 > [9,] NA 98.5 > [10,] NA 99.1 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >
apply(tmax.m, 2, max) Dale Steele wrote:> Hello -- Given the 10x2 matrix below, my goal is to create a vector > which contains the maximum of column 1 and column 2, or the only value > if there is an NA in one column. I experimented with max.col without > success. Thanks. --Dale > > > > tmax.m > tmaxhme tmaxer > [1,] 101.0 99.8 > [2,] 102.5 99.0 > [3,] 100.6 98.4 > [4,] NA 100.5 > [5,] 101.0 99.4 > [6,] NA 97.6 > [7,] NA 99.0 > [8,] 99.0 98.4 > [9,] NA 98.5 > [10,] NA 99.1 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > >-- Simon Blomberg, B.Sc.(Hons.), Ph.D, M.App.Stat. Centre for Resource and Environmental Studies The Australian National University Canberra ACT 0200 Australia T: +61 2 6125 7800 email: Simon.Blomberg_at_anu.edu.au F: +61 2 6125 0757 CRICOS Provider # 00120C
Dale Steele wrote:> Hello -- Given the 10x2 matrix below, my goal is to create a vector > which contains the maximum of column 1 and column 2, or the only value > if there is an NA in one column. I experimented with max.col without > success. Thanks. --Dale > > > > tmax.m > tmaxhme tmaxer > [1,] 101.0 99.8 > [2,] 102.5 99.0 > [3,] 100.6 98.4 > [4,] NA 100.5 > [5,] 101.0 99.4 > [6,] NA 97.6 > [7,] NA 99.0 > [8,] 99.0 98.4 > [9,] NA 98.5 > [10,] NA 99.1 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >Try: apply(tmax.m, 1, max, na.rm = TRUE)