dear group,
i have a sample matrix
name v1 v2 v3 v4
cat 10 11 12 15
dog 3 12 10 14
cat 9 12 12 15
cat 5 12 10 11
dog 12 113 123 31
...
since cat is repeated 3 times, I want a mean value for
it. Like wise for every element of the name column.
cat v1 = mean(c(10,9,5))
cat v3 = mean(c(11,12,13))
..etc.
name v1 v2 v3 v4
cat 8 11.6 11.3 13.6
dog 7.5 62.5 66.5 22.5
could any one help me in solving this mystery. thank you.