How can I add the values of each iteration of a for loop, where the index is k=0:0.001:.30, into a matrix so that I can plot the values?

I have a 'for' loop that is calculating an eqn from k=0:0.001:0.30, the loop is generating the required results for each single iteration but when I try to take each iteration and put it into a matrix I get the following error,

Subscript indices must either be real positive integers or logicals.

I think this is because of my indexing k=0:0.001:0.30, MatLab doesn't like the zeros, but I need to run the loop in this fashion to get the results I need.

This is what I have for the 'for' loop,

% preallocate space x= zeros(300,1);

for k = 0:0.001:0.30

y=3.065-(8.871*(k/H))+(14.036*(k/H).^2)-(7.219*(k/H).^3);

x(:,k)=y % store y as kth column of x

end

[Youssef Khmou]

what is the variable H

Answer 1

[Youssef Khmou]

If H is scalar you can vectorize the problem :

 k=0:0.001:0.30;
 H=2;
 y=3.065-(8.871*(k/H))+(14.036*(k/H).^2)-(7.219*(k/H).^3);

Using the loop, the index must be an integer, to respect this condition you can proceed as :

 k=0:0.001:0.30;
 for t=1:length(k)
    y=3.065-(8.871*(k(t)/H))+(14.036*(k(t)/H).^2)-(7.219*(k(t)/H).^3);
    x(:,t)=y; % store y as kth column of x
 end

[Mark]

Thank you so much for clarifying this, 'H' is a scalar so I jsut used your first suggestion