Wrong values with greater than, equal and less than or equal functions

[EDIT: Tue May 17 14:40:06 UTC 2011 - Reformat - MKF]

When I use the greater than function, equal function and less than or equal function I obtain wrong values, for example:

>> 1.6-1.5>.1
ans =
     1
>> (1.6-1.5)>.1
ans =
     1
>> (1.6-1.5)>0.1
ans =
     1
>> eq((1.6-1.5),0.1)
ans =
     0
>> gt((1.6-1.5),0.1)
ans =
     1
>> le((1.6-1.5),0.1)
ans =
     0

Answer 1

[Andy]

http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

Answer 2

[James Tursa]

You might find this utility useful:

http://www.mathworks.com/matlabcentral/fileexchange/22239-num2strexact-exact-version-of-num2str

It will display the exact decimal value of the numbers you are working with.