OddMatrix←{
     ⎕IO←0
     OM←{
         (row col locations)←⍵ ⎕VGET'row' 'col' 'locations'
         mat←row col⍴0
         ⊃{(r c)←⍺ ⋄ 1+@c⍤1⊢1+@r⊢⍵}/locations,⊂mat
     }
     OM ⍵

⍝ Tests
     Assert←{⍺←'Assertion failure' ⋄ 0∊⍵:⍺ ⎕SIGNAL 8 ⋄ shy←0}
     _←Assert [1 3 1
               1 3 1] ≡ OM(row:2 ⋄ col:3 ⋄ locations:(0 1 ⋄ 1 1))

     _←Assert   [2 2
                 2 2] ≡ OM(row:2 ⋄ col:2 ⋄ locations:(1 1 ⋄ 0 0))

     _←Assert [2 2 2
               2 2 2
               2 2 2] ≡ OM(row:3 ⋄ col:3 ⋄ locations:(0 0 ⋄ 1 2 ⋄ 2 1))

     _←Assert [ ⋄ 2 2 3 2 3] ≡ OM(row:1 ⋄ col:5 ⋄ locations:(0 2 ⋄ 0 4))

     _←Assert [3 3
               3 3
               3 3
               3 3] ≡ OM(row:4 ⋄ col:2 ⋄ locations:(1 0 ⋄ 3 1 ⋄ 2 0 ⋄ 0 1))

     'All tests passed.'
 }