MATLAB: Removing equal elements from a matrix

removing equal elements

Hi all,

I have a matrix like "a" whose some elemnts are equal to each other. I wato to transform this matrix to a vector like "b" with non-equal elements.

e.g. a=[ 1 2 3 ; 3  4 5; 6 4 7];  >> b=[1 2 3 4 5 6 7];

How can I write this program? Thanks in advance.

a=[ 1 2 3 ; 3  4 5; 6 4 7]; 
b=unique(a(:))'

b = x( 1:find( x == 4, 1, 'last' );

B=[ 4 5 6 6
  3 8 4 8
  7 3 5 3]
idx1=B==7;
idx2=B==3;
B(idx1)=3;
B(idx2)=7;