mean for each row
You need to omit the last column, though: RowM <- rowMeans(x[, -ncol(x)]) for example. -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Matthias Kohl Sent: Monday, 17 March 2008 4:14 PM To: Hesen Peng Cc: R help forum Subject: Re: [R] mean for each row or rowMeans ... Matthias
Hesen Peng wrote:
How about rowSums(x)/ncol(x), where x is the matrix? On Mon, Mar 17, 2008 at 1:48 PM, Roslina Zakaria <zroslina at yahoo.com>
wrote:
Hi r-users, How do find the mean for each row? Thank you in advance for your
help.
1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 Day
Totals
1 0.0 0.0 0.0 0.0 0.6 0.0 8.4 0.0 29.4 0.0
38.4
2 0.0 0.0 1.8 0.0 22.4 0.0 0.2 0.4 0.8 0.0
25.6
3 7.8 0.0 0.0 17.6 1.4 0.0 0.0 0.0 0.0 0.0
26.8
4 2.2 0.8 0.4 0.0 0.2 11.2 1.4 33.2 0.0 0.0
49.4
5 0.2 1.8 0.0 1.0 0.0 0.2 0.0 12.2 0.0 19.2
34.6
6 0.0 0.0 0.0 1.0 0.0 0.0 0.0 2.2 0.0 14.6
17.8
7 0.0 0.0 0.0 0.0 3.6 0.2 0.0 2.0 0.0 0.2
6.0
8 0.0 0.0 10.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
10.0
9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0.0
10 1.0 1.4 0.0 0.0 0.0 1.0 0.4 0.0 0.0 0.0
3.8
11 0.0 8.2 0.0 0.0 0.0 0.0 8.4 0.0 0.0 0.4
17.0
12 10.8 0.8 0.0 0.0 0.0 0.0 1.0 0.0 0.0 4.2
16.8
13 32.8 0.0 0.0 0.8 0.0 0.0 0.0 0.0 0.2 0.2
34.0
14 1.0 0.0 1.6 0.2 0.0 0.0 0.0 0.0 0.0 0.0
2.8
15 0.0 0.0 0.0 2.2 1.4 0.0 0.0 0.0 0.0 0.0
3.6
16 0.6 0.0 0.0 0.6 22.0 0.0 0.0 0.0 0.0 0.0
23.2
17 0.0 0.0 0.0 0.0 0.0 0.0 2.8 0.0 0.0 0.0
2.8
18 2.8 0.0 0.0 0.0 0.0 0.0 8.2 0.0 0.0 8.2
19.2
19 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.2
0.4
20 0.0 8.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
8.2
21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0.0
22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4
0.4
23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 0.0 0.0
1.2
24 0.0 0.0 0.0 0.0 1.0 0.0 0.0 2.0 8.2 0.0
11.2
25 3.2 0.0 0.0 0.6 0.6 0.0 0.0 0.0 11.8 0.0
16.2
26 0.0 0.0 26.2 0.0 12.6 0.0 0.0 2.2 0.0 0.0
41.0
27 0.2 0.0 10.6 0.0 1.2 0.0 0.0 1.8 0.0 0.0
13.8
28 0.0 4.0 0.0 5.8 0.0 0.0 0.0 0.0 0.0 0.0
9.8
29 0.2 12.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12.6
30 0.0 2.6 0.0 0.0 2.2 0.0 0.0 0.0 0.0 0.0
4.8
31 0.0 0.0 0.6 0.0 0.8 0.0 0.0 0.0 4.8 0.0
6.2
Year Totals 62.8 40.2 51.2 29.8 70.0 12.8 30.8 57.2 55.2 47.6
457.6
________________________________________________________________________ ____________
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Dr. Matthias Kohl www.stamats.de ______________________________________________ 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.