MATLAB: MATLAB display a blank graph

Question

hi, im trying to plot graph resistance against frequency. I managed to calculate the value of R, but i just get a blank graph when i tries to plot the result.Here is my codes

function [resistant ] = resistance(w,l,h)
   G = 1.59*10.^-8;
   u =pi*4*10.^-7;
   p= 6.30 *10.^7;
f = 0:8;
for i= 0:8;
q(i+1)=(2/(2*pi*f(i+1)*u*G)).^(1/2);
v(i+1) = 1-exp(-h/q(i+1));
r(i+1)= w*q(i+1)*v(i+1);
R = p*l/r(i+1);
end
plot(f,R);
xlim([0 8]);
xlabel('frequency');
ylabel('resistance');
title('graph');
end

I hope somebody can tell me if there are any error in my codes.

Answer 1

R(i+1) = p*l/r(i+1);