summation inside for loop

Have a good day. I am trying to find an easy way of writing a loop below:

v=rand(100,3)

for iz=1:3

for iznext=1 expv(:,iz)=v(:,iz)*Q_z(iz,iznext)+v(:,iz)*Q_z(iz,iznext+1)+v(:,iz)*Q_z(iz,iznext+2);

end

end

Thanks in advance.

Answer 1

[Torsten]

vec = ones(1,5)*Q_z.' ;

exp2(1:100,:) = vec ;

[Mert Demir]

Thanks but i need to use v_e in the form. v_e will not be ones(100,5) later on. it is just an initial guess. I will keep iterate that.