Message-ID: <42948950.7060805@statistik.uni-dortmund.de>
Date: 2005-05-25T14:18:56Z
From: Uwe Ligges
Subject: precision problem
In-Reply-To: <3f87cc6d05052507083041d095@mail.gmail.com>
Omar Lakkis wrote:
> 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