Fibonacci Times (Iter vs Recursive) Log Log Plot

I'm trying to graph one log-log plot of the execution time

against increasing input values for an iterative fibonacci sequence solution

and a recursive fibonacci sequence solution, two functions I made to show the

fibonacci sequence, and I'm not sure if I'm doing it right. I have a graph

showing up, but I don't know if my code is correct for it. I know that my

fib_iter and fib_recur work, so that shouldn't be an issue. Here's what I have

at the moment:

    % 
function fib_plot()
n_rec = 10:25;  t_rec = zeros(size(n_rec));
for i = 1:length(n_rec)
n = n_rec(i);
tic; fib_recur(n); t_rec(i) = toc;
end
n_iter = 1000:1000:100000;  t_iter = [];
for n = n_iter
tic; fib_iter(n); ti = toc;
t_iter = [t_iter ti];
end
loglog(n_rec,t_rec,n_iter,t_iter);
xlabel('log N'), ylabel('log Time');
legend('recursion','iteration');

Please let me know if I'm doing this correctly- my image is below:

http://postimage.org/image/gff3xhyy9/

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers

[Walter Roberson]

Please do not use "help" as a tag, not unless you are asking a question about the "help" command itself. Everyone wants help, so tagging with "help" does not add value.

[SB]

Thanks for the input, I've adjusted accordingly.

[Walter Roberson]

Looks plausible, taking into account that you are using very different ranges for the testing (which would probably not be expected, so you might want to consider including 1:999 in your iterated test.)