What are the best practices for floating-point comparisons in Matlab?

Question

Obviously, float comparison is always tricky. I have a lot of assert-check in my (scientific) code, so very often I have to check for equality of sums to one, and similar is

Answer 1

Don't know any special build in solution. Maybe something with using eps function?

For example as you probably know this will give False (i.e. 0) as a result:

>> 0.1 + 0.1 + 0.1 == 0.3

ans =

     0

But with eps you could do the following and the result is as expected:

>> (0.1+0.1+0.1) - 0.3  < eps     

ans =

     1