union
Find the union of the sets of elements in two arrays.
y=union(a, b)
Inputs
a Any array.
b Any array, but must be a of the same type as the first input.
Outputs
y A one-dimensional array of unique elements that are elements of either of the inputs.


Example
>>union({"usa","usa","canada"},{"brazil","canada"})
  brazil
  canada
  usa

>>union([2 3 4 2],[ 1 2 78 8 23 2])
Columns 1 through 6
          1          2          3          4          8         23
Column 7
         78