Typos in code are common. A typo should break your code and the error message would indicate an unfamiliar variable or function name such as
x = 1:5;
y = x.^2;
pllot(x,y, 'o')
% ERROR
Unrecognized function or variable 'pllot'.
% -OR-
mass = randi(100,1,20);
accel = sort(rand(1,20));
velocity = mass .* accel;
velAvg = mean(velosity);
% ERROR
Unrecognized function or variable 'velosity'.
If you're using smart variable names, the typo should be obvious when you see it. "velosity" in my example above is recognizeable.
A typo shouldn't convert a unique variable name into a duplicate. For example, this code below would not cause an error and the typo would be very difficult to find because of the horrible variable names.
% Bad variable names!
ti = 5;
tii = 6;
ti+tii/tii
% ^oops that was supposed to be ti
This is a problem concerning variable names, not so much typos.
