［Octave］行列式を求める

det関数を使う。

> mx = [3]
mx = 3
> det(mx)
ans = 3
> mx = [1 2; 3 4]
mx =
   1   2
   3   4
> det(mx)
ans = -2
> mx = [0 3 2 -1; -4 6 1 5; 0 -2 3 -1; -1 0 0 2]
mx =
   0   3   2  -1
  -4   6   1   5
   0  -2   3  -1
  -1   0   0   2
> det(mx)
ans = 28