Remove some numbers from an array and replace them with zero?

Lets say the array is like this:

A = [4 4 4 4 6 6 6 6 6 6 2 2 3 3 3 5 5 5 5 5 3 3 3];

How could I change the matrix to be like this:

B = [4 0 0 0 6 0 0 0 0 0 2 0 3 0 0 5 0 0 0 0 3 0 0];

I want to represent each new number in the array but not more than once. The numbers may occure several times as number three in this example.

Answer 1

[Stephen23]

>> A = [4,4,4,4,6,6,6,6,6,6,2,2,3,3,3,5,5,5,5,5,3,3,3]
A =
  4  4  4  4  6  6  6  6  6  6  2  2  3  3  3  5  5  5  5  5  3  3  3
>> B = A;
>> B([false,~diff(B)]) = 0
B =
  4  0  0  0  6  0  0  0  0  0  2  0  3  0  0  5  0  0  0  0  3  0  0

[Rikke]

Perfect, it worked! Thanks!