Relational Operator doesn't work

After a simulation I want to determine the limits of the axes using the relational operator ==. For example:

refTime = 0:2e-3:1.5;
t0 = 0.8;
find(refTime == t0)

this returns:

ans =

   Empty matrix: 1-by-0

If I try the following in the same instance:

x = 0:10
find(x == 5)

It works and returns

ans = 6.

What could be wrong??

Answer 1

[Azzi Abdelmalek]

Try

refTime = 0:2e-3:1.5;
t0 = 0.8;
tolerence=1e-5
find(abs(refTime-t0)<tolerence)

[Esteban]

Thanks, this works :-) But I still don't see why my approach doesn't work. By visual inspection of refTime in the workspace I can see that it has an element with value exactly equal to t0.

[Azzi Abdelmalek]

Look at this link

http://www.mathworks.com/matlabcentral/answers/57444-faq-why-is-0-3-0-2-0-1-not-equal-to-zero