[R] mean for each row

[Matthias Kohl]

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
>>
>>
>>       ____________________________________________________________________________________
>>  Be a better friend, newshound, and
>>
>>  ______________________________________________
>>  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.
>>
>>     
>
>
>
>   

-- 
Dr. Matthias Kohl
www.stamats.de