MATLAB: How to plot a family of sine waves ranging from 0.01 to 30 Hz

Question

I have tried using this:

for i = 1:30;
y(:,i) = sin(2*i*pi*n);
end

But if I give 0.01:30, it gives an error saying values should be integers.

Answer 1

n = sort(randi(50,1,10));   %I don't know what your n is...
ivals = 0.1:30;   %did you mean 0:0.1:30 ?
for iidx = 1:length(ivals)
  i = ivals(iidx);
  y(:,iidx) = sin(2.*i.*pi.*n);
end
subplot(1,2,1)
plot(n, y);
title('y vs n')
subplot(1,2,2);
plot(ivals, y);
title('y vs i');