[R] max.col weirdness
gunter.berton at gene.com
Thu May 28 23:02:09 CEST 2009
Try reading the man page, which says:
When ties.method = "random", as per default, ties are broken at random. In
this case, the determination of a tie assumes that the entries are
probabilities: there is a relative tolerance of 1e-5, relative to the
largest (in magnitude, omitting infinity) entry in the row.
Genentech Nonclinical Biostatistics
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Daryl Morris
Sent: Thursday, May 28, 2009 1:47 PM
To: r-help at r-project.org
Subject: [R] max.col weirdness
I think there's some rounding issue with returning the max column.
(running 2.9.0 on an Apple, but my buddy found it on his PC)
> x <- matrix(c(1234.568,1234.569,1234.567),1)
> x <- matrix(c(12345.568,12345.569,12345.567),1)
> x <- matrix(c(112345.568,112345.569,112345.567),1)
R-help at r-project.org mailing list
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
More information about the R-help