RE: [R] precision problem

From: bogdan romocea <br44114_at_gmail.com>
Date: Thu 26 May 2005 - 00:21:43 EST


This is a FAQ, 7.31.

-----Original Message-----
From: Omar Lakkis [mailto:uofiowa@gmail.com] Sent: Wednesday, May 25, 2005 10:09 AM
To: r-help@stat.math.ethz.ch
Subject: [R] 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?



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R-help@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 Received on Thu May 26 00:44:55 2005

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