~ Not

One-argument form  See also Without

The right argument must consist only of the numbers 1 or 0. The effect of ~ is to change each 1 to 0 and each 0 to 1.

             ~1
       0

             ~1 1 1 0                (Each 1 in a vector is changed to 0
       0 0 0 1                        and each 0 to 1)

             TABLE
       1 1 1
       0 0 0
       1 0 1
             ~TABLE                  (Each 1 in a matrix is changed to 0
       0 0 0                          and each 0 to 1)
       1 1 1
       0 1 0