make indicator matrix in mata

[Gbenga Adejafe]

Hi, i want to make a 0/1 matrix in mata based on some other matrix (in my example W) based on value of each element, so if it is greater than some value element should be 1 and otherwise 0.I can make it by loops as below but is there some command that already does this in shorter way?Thanks!

mata:
n = rows(W)

for (i=1; i<=n; i++){
for (j=1; j<=n; j++){
if (W[i,j]>2) W[i,j] = 1
else W[i,j] = 0
}
}
end

[Carlo Lazzaro]

tratt (please see the FAQ about the preference on this forum for real given and family names. Thanks):
this query should be posted to Mata forum.

[Nick Cox]

Exactly as Carlo said, but any way

: W = (1, 2, 3 \ 3, 2, 1 \ 1, 2, 3)

: W :> 2
       1   2   3
    +-------------+
  1 |  0   0   1  |
  2 |  1   0   0  |
  3 |  0   0   1  |
    +-------------+

: frog = W :> 2

: frog
       1   2   3
    +-------------+
  1 |  0   0   1  |
  2 |  1   0   0  |
  3 |  0   0   1  |
    +-------------+

[Gbenga Adejafe]

Thanks!