Displaying 20 results from an estimated 30000 matches similar to: "64 bit R double precision"
2005 Jul 12
2
what is the .Machine$double.xmin for a 64 bit machine?
I use a 32 bit machine. For those using 64 bit machines,
what is the .Machine$double.xmin for for machines?
regards. Stephen.
----- Original Message -----
From: Achim Zeileis <Achim.Zeileis at wu-wien.ac.at>
Date: Tuesday, July 12, 2005 10:51 am
Subject: Re: [R] exact values for p-values - more information.
> On Tue, 12 Jul 2005, S.O. Nyangoma wrote:
>
> > > If they
2006 May 29
6
Numerical error in R (win32) (PR#8909)
Hi
I had observed the following problem in R (also C, Matlab, and Python).
sprintf('%1.2g\n', 3.15)
give 3.1 instead of 3.2 whereas an input of 3.75 gives 3.8.
Java's System.out.printf is ok though.
> round(3.75,1)
[1] 3.8
> round(3.15,1)
[1] 3.1
Similar outcome with sprintf in R.
However, the right answer should be 3.2
Regards
Teckpor
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2008 Mar 25
2
Incorrect behavior in 64-bit version (PR#11034)
Full_Name: Lodewijk Bonebakker
Version: v2.6.2
OS: Solaris, x86, snv_80
Submission from: (NULL) (192.18.43.225)
when I build R in 32-bit mode on my 64-bit OS, R works as expected:
R version 2.6.2 (2008-02-08)
...
Type 'q()' to quit R.
> m <- matrix(ncol=2,c(1:6))
>
> m
[,1] [,2]
[1,] 1 4
[2,] 2 5
[3,] 3 6
> n <- log10(m)
> n
[,1]
2006 Sep 04
1
Coercing elements of a matrix from integer to double
Ive been converting elements of matrices and arrays, e.g., from
Integers to double-precision, by vectorizing the matrix and then
remaking it. Alternatively, I can redefine one element as double
which then redefines them all. Both methods are quick, so I guess
I shouldn't complain, but I would have thought there'd be something
more obvious. Have I missed it?
Here's my redimensioning
2007 Dec 17
4
read.table() and precision?
Hi,
I'm currently working with data that has values as large as 99,000,000
but is accurate to 6 decimal places. Unfortunately, when I load the
data using read.table(), it rounds everything to the nearest integer.
Is there any way for me to preserve the information or work with
arbitrarily large floating point numbers?
Thank you,
Wojciech
--
Five Minutes to Midnight:
Youth on human rights
2005 Nov 02
1
configure error under FC 4 64 bit (PR#8276)
Full_Name: Rob James
Version: 2.2.0
OS: Fedora Core 4 64 Bit
Submission from: (NULL) (24.79.225.106)
Attempting to run the configure script yields the following inscrutable error:
configure: error: --with-readline=yes (default) and headers/libs are not
available
This occurs at the following point in the processing of the configure script:
checking for readline/history.h... no
checking
2006 May 22
2
SUSE 10.1 64 bit binary
Hi,
I was just wondering if anyone had created a 64 bit binary for SUSE 10.1
x86_64 yet. Unfortunately, I upgraded before looking whether a package
was available and now cannot find a suitable package on CRAN. If noone
has produced one yet, does anyone have any idea when one will be available?
Many Thanks
Daniel Brewer
2008 Jan 21
1
R on Linux 64-bit
I am downloading the latest R source code R-2.6.1.tar.gz
I am installing ion a 64-bit machine.
Is the configuration script the proper one for 64-bin installation ? I
mean the compiler and
linker options ..?
Thanks you,
Maura
--
Maura E.M
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2006 Jan 20
3
abline() or predict.lm() when log="x"
Hello,
I'm trying to plot a fitted lm() line on a plot when the one
explanatory variable is log transformed and log="x". I get different
lines using abline and predict.lm().
#Example
x <- 1:100
y <- rnorm(100)
plot(y ~ x, log="x")
abline(lm(y ~ log(x)))
lines(x, predict(lm(y ~ log(x))), lwd=2)
I'm sure I'm missing something but could someone tell me which
2005 Nov 14
1
effect sizes for Wilcoxon tests
Hello,
I use t.test for normal distributed and wilcox.test for non-normal
distributed samples.
It is easy to write a function for t.test that calculates the effect
size, because all parts of the formula are available from the t.test
result: r = sqrt(t*t / (t*t + df))
However, for Wilcoxon tests, the formula for effect sizes is:
r = Z / sqrt(N)
I wonder how I can calculate the Z-score in R for
2009 Nov 27
2
using reshape to do ANOVA mixed models
Hi,
I just started with R and I found that there are many options to rearrange
the data to do mixed models.
I want to use the reshape function. I have 2 between subject variables and
one within.
I was able to change the data structure but still - the result of the aov
functions are calculating everything as a within subject.
the table looks like this:
SerialNo breed treatment distance_1
2009 Apr 09
3
type.convert (PR#13646)
Full_Name: Stefan Raberger
Version: 2.8.1
OS: Windows XP
Submission from: (NULL) (213.185.163.242)
Hi there,
I recently noticed some strange behaviour of the command "type.convert",
depending on the startup mode used. But there also seems to be different
behaviour on different PCs (all running the same OS and the same version of R).
On PC1:
When I start R in SDI mode (RGui --no-save
2008 May 05
4
Column renaming
Dear all,
Is there a less cumbersome way to rename a column by name (as opposed
to index) than --
names( X)[ names[ X] == "bob"]<-"sue"
?
A semi-related question: how does one get the index of a column by
name, something along the lines of col.index( X, "sue") ?
Chip Barnaby
---------------------------------------------------------
Chip Barnaby
2008 May 26
1
Double HTML encoding in R Bug Tracking Submission form (PR#11517)
The "New Bug Report" form available from http://bugs.r-project.org/
appears to double encode the HTML of the "body" text area of the form.
This behaviour can be seen in submission ID # 11515, where (as an
example) "??" is converted to "Δ" in the browser view or
"&#916;" in the HTML source code. Conversion to
2006 Mar 02
5
Deparsing '...'
Hi,
The following function works, but is there a neater way to write it?
f = function(x,...)
{
# return a character vector of the arguments passed in after 'x'
gsub("
","",unlist(strsplit(deparse(substitute(list(...))),"[(,)]")))[-1]
}
> f(x,a,b,c*d)
[1] "a" "b" "c*d"
>
Thanks.
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2008 Mar 26
3
Misc/List Search Path from keyboard (PR#11036)
Full_Name: Richard Reed
Version: 2.6.2
OS: MS Windows XP Pro
Submission from: (NULL) (76.121.170.35)
Pressing Alt-M+s doesn't search path. It just generates another ">". It does
this in "vanilla" too. However, Alt-M+click "list search path" does work. Note
that when I press Alt-M (and the "Misc" menu drops down) the second "s" in
2007 Feb 06
2
when i run ./configure,i meet a problem
i get a message:
configure: WARNING: you cannot build info or html versions of the R manuals
what should i do ?
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2008 Dec 22
2
R 2.8.1
R 2.8.1 is packaged up and queued up for testing. Please test this out:
Fedora 9:
https://admin.fedoraproject.org/updates/rpy-1.0.3-6.fc9,R-2.8.1-1.fc9
Fedora 10:
https://admin.fedoraproject.org/updates/rpy-1.0.3-6.fc10,R-2.8.1-1.fc10
Once you've tested it, please, please, go to the update URL above and
click "Add A Comment". If it works for you, click "Works for me" and
2005 Jul 14
2
Calculate of data frame
Hello,
I have a dataframe which I read from a file:
df <- readtable(myFile);
The dataframe has 4 columns: "model", "count", "value" and "date" where
"model" and "date" are made of charactors and "count" and "value" are
numbers. An example is like:
model count value date
A 4 20.8
2009 Nov 23
1
R: Re: chol( neg.def.matrix ) WAS: Re: Choleski and Choleski with pivoting of matrix fails
It works! But Once I have the square root of this matrix, how do I convert it
to a real (not imaginary) matrix which has the same property? Is that
possible?
Best,
Simon
>----Messaggio originale----
>Da: p.dalgaard at biostat.ku.dk
>Data: 21-nov-2009 18.56
>A: "Charles C. Berry"<cberry at tajo.ucsd.edu>
>Cc: "simona.racioppi at