Matlab - Eliminar ceros de un vector

>> V= [1 5 8 0 5 2 0 2 1 0 0.6 12 0]

V1=V(V~=0)

n=length(V(V==0))

V =

    1.0000    5.0000    8.0000         0    5.0000    2.0000         0    2.0000    1.0000         0    0.6000   12.0000         0

V1 =

    1.0000    5.0000    8.0000    5.0000    2.0000    2.0000    1.0000    0.6000   12.0000

n =

     4

V=[1 5 8 0 5 2 0 2 1 0 0.6 12 0];

[Vsin0 num0]=ex6(V)

    function [Vsin0 num0]=ex6(V)

        num0=0;

        for i=1:size(V,2);

            if V(i)==0;

                num0=num0+1;

            else

                Vsin0(i)=V(i);

            end

        end

    end

function [Vsin0, num0] = ex6(V)

Vsin0 = [];

num0 = 0;

for i=1:size(V,2)

    if V(i) == 0

        num0 = num0 + 1;

    else

        Vsin0 =[Vsin0 V(i)];

    end

end

end

function [Vsin0 num0]=ex6(V)

num0=0;

k=1;

for i=1:size(V,2)

if V(i)==0

num0=num0+1;

else

Vsin0(k)=V(i);

k=k+1;

end

end

end

function [V, num0] = ex6(V)

num0 = 0;

for i = size(V,2):-1:1

    if V(i) == 0

       num0 = num0 + 1;

       V(i) = [];

    end

end

end