Displaying 1 result from an estimated 1 matches for "tp21218219p21218541".
2008 Dec 30
5
Randomly remove condition-selected rows from a matrix
Hello all,
I create the following matrix:
m <- matrix(1:20, nrow = 10, ncol = 2)
which looks like:
[,1] [,2]
[1,] 1 11
[2,] 2 12
[3,] 3 13
[4,] 4 14
[5,] 5 15
[6,] 6 16
[7,] 7 17
[8,] 8 18
[9,] 9 19
[10,] 10 20
Then, I want to remove randomly 2 rows among the ones where m[,1]<8
and m[,2]>12
I suppose the