label_outer on a 3x3 grid
-1
-0.5
0
0.5
1
-1
-0.5
0
0.5
1
0
2
4
6
8
10
-1
-0.5
0
0.5
1
0
2
4
6
8
10
0
2
4
6
8
10
label_outer on a 3x3 grid