octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
error: writing file '/.octave_hist': Read-only file system
error: ignoring const octave::execution_exception& while preparing to exit

     0   0   0
   2   0   2
   0   0   0
   -4  -16  -36
    1    0    1
   -4  -16  -36
   12  -16   28
    0    0    0
  -12   16  -28
   -4    8  -12
    2    0    2
    4   -8   12
    4   16   36
    1    0    1
    4   16   36
  -12   16  -28
    0    0    0
   12  -16   28
  -2   4  -6   2  -4   6
   1   0   1   1   0   1
   2  -4   6  -2   4  -6
  -2   4  -6
   1   0   1
   2  -4   6
   2  -4   6
   1   0   1
  -2   4  -6

   0   0   0
   2   0   2
   0   0   0
   -4  -16  -36
    1    0    1
   -4  -16  -36
   12  -16   28
    0    0    0
  -12   16  -28
   -4    8  -12
    2    0    2
    4   -8   12
    4   16   36
    1    0    1
    4   16   36
  -12   16  -28
    0    0    0
   12  -16   28
  -2   4  -6   2  -4   6
   1   0   1   1   0   1
   2  -4   6  -2   4  -6
  -2   4  -6
   1   0   1
   2  -4   6
   2  -4   6
   1   0   1
  -2   4  -6