storing values generated in a 'for'loop

[asha g]

I have a program in which I am iterating V from -80 to
80 to generate values of n. then I have to plot n vs
V.

I wrote

for iter = -80:10:80
V= iter;
[alphan,betan,alphah,betah,alpham,betam]= ratcon(V);
[n,m,h] =
gatpara2(alphan,betan,alphah,betah,alpham,betam);

n(iter) = n;
m(iter)= m;
h(iter)= h;
V(iter) = V;
end 
plot(V,n,'r')

The problem I am having is that the command 
n(iter) = n; generates an error message saying
subscript indexes must be real positive integers or
logicals. 
How do I write those statements in order that they
store all values of n,m,h and V during the iteration?
I am not sure if you need the function files too to
help me. If so, can send them. 
Thanks for your help.
Asha 

 
   
   
   
  Goals too clearly defined can become blinkers. 
  Mary Catherine Bateson 



      
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