Vectorizing code

[Torbjörn Rathsman]

How do I vectorize this piece of code?

a is an NDArray

for i=1:size(a,1)
        for j=1:size(a,2)
                v=[a(i,j,1) a(i,j,2) a(i,j,3)]';
                v=A\v;
                a(i,j,1)=v(1);
                a(i,j,2)=v(2);
                a(i,j,3)=v(3);
        end
end