Matlab gives wrong answer

Question

If the following code is executed MATLAB makes a mistake. Can someone verify this?

floor([0.1:0.1:2]/0.01)

So what is the 129 doing here??<

Answer 1

it's a rounding approximation brought on by the array construction. The solution would be to add eps:

floor([0.1:0.1:2]/0.01+ eps([0.1:0.1:2]/0.01))