[R] precision problem

[Omar Lakkis]

I have prices that I am finding difficult to compare with ==, > and >,
due to precision. For example: the numbers should match, with '==',
but they differ in the magnitude of 1e-14 due to bunch of calculations
that I run on them. Programming with java, I am used to implementing a
function that compares the difference between the numbers to a pre
determined precision factor. This could be very slow when  I have two
matrices of numbers that I could otherwise compare with a simple '==',
'>'  or '<' in R.
What is teh best solution for this problem?
Can I control the precision of ==, > and < without having to
reimplement the operations in a slow way?