From: John Fox <jfox_at_mcmaster.ca>

Date: Thu 26 May 2005 - 00:27:57 EST

John Fox

Department of Sociology

McMaster University

Hamilton, Ontario

Canada L8S 4M4

905-525-9140x23604

http://socserv.mcmaster.ca/jfox

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 00:53:52 2005

Date: Thu 26 May 2005 - 00:27:57 EST

John Fox

Department of Sociology

McMaster University

Hamilton, Ontario

Canada L8S 4M4

905-525-9140x23604

http://socserv.mcmaster.ca/jfox

> -----Original Message-----

*> From: r-help-bounces@stat.math.ethz.ch
**> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Omar Lakkis
**> Sent: Wednesday, May 25, 2005 9:09 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?
**>
**> ______________________________________________
**> 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
*

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 00:53:52 2005

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