>>  A = [ [2.1, 0.2, 2.3]; [2.4, 2.5, 3.6]; [3.7, 3.8, 4.9]]

A =

   2.10000   0.20000   2.30000
   2.40000   2.50000   3.60000
   3.70000   3.80000   4.90000


>>  det(A)

ans = -2.9900