TR == Troy Robertson troy.robert...@aad.gov.au
on Thu, 7 Oct 2010 13:50:49 +1100 writes:
On 10/06/2010 06:12 PM, Troy Robertson wrote:
Hi all,
After no replies to my previous message I thought I might show some
code to demonstrate the change and again seek
I'm using .Call() to call C code from R under Windows (on an Intel
Core 2 duo). The C code involves some very small numbers, and I think
I'm losing precision using doubles. I thought I might use long doubles
to see if I can get that precision back. I have a few questions:
1. Does this affect
On Oct 7, 2010, at 2:28 PM, Richard D. Morey wrote:
I'm using .Call() to call C code from R under Windows (on an Intel Core 2
duo). The C code involves some very small numbers, and I think I'm losing
precision using doubles.
The magnitude of numbers has really nothing to do with precision
This has been fixed in R-beta. Thanks! H.
On 10/01/2010 06:31 PM, Hervé Pagès wrote:
Hi,
The cleanup_pkg() function defined the big tools:::.build_packages()
function in tools/R/build.R is currently broken. When Makefiles are
used cleanup_pkg() doesn't clean anything because of the way
Hi,
On 09/30/2010 10:45 AM, Hervé Pagès wrote:
[...]
If that is not desirable, could the tools:::.build_packages() function
not put quotes around the value of the TAR environment variable (the
code does shQuote(TAR)), at least on Windows, so I can set this
variable to
tar --no-same-owner
In working with small numbers, I usually look for a solution involving a
log transformation. For instance, when a or b are very small, we can
compute the ratio
a / ( a + b )
more safely by
1 / ( 1 + exp( log(b) - log(a) ) )
Alternative data types are sure to cause issues with portability. It's
-Original Message-
From: Martin Maechler [mailto:maech...@stat.math.ethz.ch]
Sent: Thursday, 7 October 2010 9:50 PM
To: Troy Robertson
Cc: 'Martin Morgan'; 'r-devel@R-project.org'; 'John Chambers'
Subject: Re: [Rd] Recursion error after upgrade to R_2.11.1
[Sec=Unclassified]
The model.frame function has trouble with a certain type of really long
formula. Here is a test:
tname - paste('var', 1:50, sep='')
tmat - matrix(rnorm(500), ncol=50, dimnames=list(NULL, tname))
tdata - data.frame(tmat)
temp1 - paste( paste(tname, tname, sep='='), collapse=', ')
temp2 -
On 10/07/2010 12:58 PM, Duncan Murdoch wrote:
R 2.12.2 (currently beta) has in its NEWS :
Just pointing out a typo: the version of the beta is 2.12.0.
Duncan Murdoch
o A facility for defining reference-based S4 classes (in the OOP
style of Java, C++, etc.) has been added
Troy
For what it's worth, the ExpressionSet / eSet class in Biobase from
Bioconductor has for a long time implemented a pass-by-reference
system, using amongst other stuff locked environments to make sure
things are read only. You might find this useful to look at.
In general it is hard to
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