%load_ext oct2py.ipython

%%octave
test = [-1 1 -1 1 ; 1 -1 1 -1 ; 1 1 -1 -1 ; -1 -1 1 -1]

test =

       -1        1       -1        1
        1       -1        1       -1
        1        1       -1       -1
       -1       -1        1       -1

%%octave
test * test

ans =

        0       -4        4       -2
        0        4       -4        2
        0        0        0        2
        2        2       -2        0