{⊂⍵} T 3 5 ⊢4 5⍴⍳20
┌────────────┬─────────────┬──────────────┬─────────────┬────────────┐
│0 0 0 0 0│0 0 0 0 0│ 0 0 0 0 0│ 0 0 0 0 0│ 0 0 0 0 0│
│0 0 1 2 3│0 1 2 3 4│ 1 2 3 4 5│ 2 3 4 5 0│ 3 4 5 0 0│
│0 0 6 7 8│0 6 7 8 9│ 6 7 8 9 10│ 7 8 9 10 0│ 8 9 10 0 0│
├────────────┼─────────────┼──────────────┼─────────────┼────────────┤
│0 0 1 2 3│0 1 2 3 4│ 1 2 3 4 5│ 2 3 4 5 0│ 3 4 5 0 0│
│0 0 6 7 8│0 6 7 8 9│ 6 7 8 9 10│ 7 8 9 10 0│ 8 9 10 0 0│
│0 0 11 12 13│0 11 12 13 14│11 12 13 14 15│12 13 14 15 0│13 14 15 0 0│
├────────────┼─────────────┼──────────────┼─────────────┼────────────┤
│0 0 6 7 8│0 6 7 8 9│ 6 7 8 9 10│ 7 8 9 10 0│ 8 9 10 0 0│
│0 0 11 12 13│0 11 12 13 14│11 12 13 14 15│12 13 14 15 0│13 14 15 0 0│
│0 0 16 17 18│0 16 17 18 19│16 17 18 19 20│17 18 19 20 0│18 19 20 0 0│
├────────────┼─────────────┼──────────────┼─────────────┼────────────┤
│0 0 11 12 13│0 11 12 13 14│11 12 13 14 15│12 13 14 15 0│13 14 15 0 0│
│0 0 16 17 18│0 16 17 18 19│16 17 18 19 20│17 18 19 20 0│18 19 20 0 0│
│0 0 0 0 0│0 0 0 0 0│ 0 0 0 0 0│ 0 0 0 0 0│ 0 0 0 0 0│
└────────────┴─────────────┴──────────────┴─────────────┴────────────┘
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Tile sizes apply independently to each axis. |
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Each element of ⍵ in its turn is the middle of a tile. |
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The right arguments of the operand function ⍺⍺ have uniform shape. |
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Shards are symmetric on each side. |
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