9 ms·
K handles the general case: 1 1 1 + 2 2 2 3 3 3 (1 1 1; 2 2 2; 3 3 3) + (4 4 4; 5 5 5; 6 6 6) (5 5 5 7 7 7 9 9 9)
by kevinlawler 15y ago
K handles the general case:
1 1 1 + 2 2 2
3 3 3
(1 1 1; 2 2 2; 3 3 3) + (4 4 4; 5 5 5; 6 6 6)
(5 5 5
7 7 7
9 9 9)
- hazexp 15y agoAs does R :) > c(1, 1, 1) + c(2, 2, 2) [1] 3 3 3 > matrix(c(1, 1, 1, 2, 2, 2, 3, 3, 3), + ncol = 3, byrow = TRUE) + + matrix(c(4, 4, 4, 5, 5, 5, 6, 6, 6), + ncol = 3, byrow = TRUE) [,1] [,2] [,3] [1,] 5 5 5 [2,] 7 7 7 [3,] 9 9 9 Not quite so concise and elegant but it's pretty straightforward stuff for most R users.