given value of matrix, getting it's coordinate
r
Solution
`which()` takes an argument, `arr.ind=TRUE`, which will return the indices of all `TRUE` elements in a logical matrix to which it is applied.
## An example matrix
set.seed(1)
m <- matrix(sample(1:100, 10), ncol=2)
m
# [,1] [,2]
# [1,] 27 86
# [2,] 37 97
# [3,] 57 62
# [4,] 89 58
# [5,] 20 6
## An example application
which(m==58, arr.ind=TRUE)
# row col
# [1,] 4 2
Problem
I have matrix, I want to write a function, get the element of matrix and return me the coordinate of number inside of matrix. could somebody give an idea how to implement it ? ``` > A [,1] [,2] [1,] 10 20 [2,] 21 17 [3,] 13 25 [4,] 21 11 [5,] 31 24 ``` for example myfunction(11) ``` > 11 > row 3, col 1 ```