Contour not plotting correctly in MATLAB--works in Mathematica

I've been trying to get a contour to plot in MATLAB where I have been running analysis on my data, but it will not plot correctly. I have translated the formula into Mathematica (just get rid of all of the matrix '.' operations) and it plots correctly (below).

This is the formula that it should be plotting:

And this is the code I have been running on MATLAB to no avail (it seems to scale with S and F input ranges):

 %Establish Constants from Literature
s_u = 1.202^2; 
f_u = (168/60)^2;
E0 = 24/60;
 %Generate Matricies
f = linspace(0,1);
s = linspace(0,2.5);
[S,F] = meshgrid(s,f);
Z = ((s_u)*(f_u)*E0)./(S.*F.* (s_u-(S.^2)).* (f_u-(F.^2)) ); 
 %Plot
contour(F,S,Z)

Any help would be much appreciated!

Answer 1

[Abraham Boayue]

Hey Emma, what happens if you divide by zero, looks like you are doing just that (S and F will become zero at some point in your code). This is not a solution. It's just to allow you see clearly what's going on in the background of your code.

%Generate Matricies (Increase the figure window to see clearly)
  f = linspace(-30,20, 30); % some combinations of f and s will include zero
  s = linspace(-20,20,30);  % in S or F giving an undesirable result, since division
                            % by zero is not allowed.
  [S,F] = meshgrid(s,f);
  ss = find(S==0); % Check for zeros in S and F 
  ff = find(F==0); % Try to make some conditions to avoid dividing by zero.
  Z = ((s_u)*(f_u)*E0)./(S.*F.* (s_u-(S.^2)).* (f_u-(F.^2)) ); 
   %Plot

    Zmin = min(min(Z));
    Zmax = max(max(Z));
    spacing = 0.005; % draw more circles between each interval for smaller values
    topspace = 1;    % increase the upper limit circles
    levels=[Zmin:spacing:1,1,1:topspace:Zmax];
    contour(F,S,Z,levels);
    grid

[Emma Reznick]

That works great, thanks! I had to add a line in to remove the infinite terms, but otherwise very helpful!

Here is what I had to add:

Z(isinf(Z)==1)=15

[Abraham Boayue]

You are welcome, I glad you well able to come up with a solution.