how to do a graph

Hey, This is what i've tried to do : Use a for loop to calculate the number of parasites in your body and in your assistant until day 30, and then show two graphs :

This is what i did but I only have one graph instead of two

 % m is the number of parasites in my body and a is for the assistant. I started with 400 parasites and it increase at 10% per day.
 for i=1:30
    m(i) = 400*(1.1^i);
    a(i) = 120*(1.2*i);
    disp(plot(m));
    disp(plot(a));
 end

Thanks

Answer 1

[Amit]

 m = zeros(30,1);
 a = m;
 for i=1:30
    m(i) = 400*(1.1^i);
    a(i) = 120*(1.2*i);
 end
 plot(m);
 hold on;
 plot(1:30,a,'b');