You can do:
alpha = 'a':'z';
cases = 8:12;
for i = 1:length(cases)
S.(alpha(i)) = load(['case' num2str(cases(i))],'Fval2');
end
But since you have 30 files, you might want to consider what happens when you hit z... If your files are all similar and have the same variable names you are loading in from each file, you may want consider a structure array:
cases = 8:37
for i = 1:length(cases)
S(i) = load(['case' num2str(cases(i))],'Fval1','Fval2');
end
Which you can then use by doing things like S(2).Fval2. Structure arrays can be a little difficult to work with at times, but might suit your needs perfectly.
