How to get the unique and NON-ZERO rows of a matrix?

Dear Experts,

I do not know how to get the unique and non-zero rows of a matrix, can you help me to figure it out please?

For example,

a = [1 2 3
     0 0 0
     2 4 6]

While the following command gives me the unique rows but it includes the Zero rows as well that I do not want to have in my desired output

unique(a,'rows')

my desired output has to be as :

   [1 2 3
    2 4 6]

thanks for helps.

Answer 1

[Homayoon]

I guess I find it out!!

   unique(a(all(a,2),:),'rows')

Answer 2

[Walter Roberson]

row_is_zero = all(a==0,2);
unique( a(~row_is_zero, :), 'rows')

[Homayoon]

Thanks Walter, I did not realize you had answered. Sorry to take your time and I really appreciate your being helpful. Thanks