RosettaCodeData/Task/Matrix-arithmetic/Stata/matrix-arithmetic-2.stata

: a=1,1,1,0\1,1,0,1\1,0,1,1\0,1,1,1
: a
[symmetric]
       1   2   3   4
    +-----------------+
  1 |  1              |
  2 |  1   1          |
  3 |  1   0   1      |
  4 |  0   1   1   1  |
    +-----------------+

: det(a)
  -3

: sumrec(a,-1)
  -3

: sumrec(a,1)
  9