How can i delete zeros of a Simulation Output?

I have a list of values coming from a Simulink model.

I want to ignore the rows that are aproximately 0. I tried with the following code, but the problem is that i keep getting the same output (with 0 instead of NaN). What should I do?

for i=1:1:length(SimOut.System1_UPF_IQ.signals.values(:,1))
    if (abs(SimOut.System1_UPF_IQ.signals.values(i,3)) <= 1E-5)
        SimOut.System1_UPF_IQ.signals.values(i,2) = nan;        SimOut.System1_UPF_IQ.signals.values(i,3) = nan;
    else
    end
end

Answer 1

[Rebeka]

a=[1 0 9 7; 3 4 5 6; 0 5 0 0; 2 3 4 5; 1 1 1 1];
x=size(a);
m=x(1);
n=x(2);
for i=1:m
    for j=1:n
        if a(i,j)==0
            a(i,:)=[];
            b=size(a);
            m=b(1);
            n=b(2);
        else
            return
        end
    end
end
ans=a;
disp(ans)

You can try this one. Though I think there would be more concise way to do this