precision problem

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?
The R FAQ "Why doesn't R think these numbers are equal?" points you to
?all.equal

Uwe Ligges
______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

precision problem

Thread (8 messages)