rame(n=c("72057594037927936", "72057594037927937"),
>name=c("foo", "bar"))
>length(unique(tmp$n))
># 2
>write.csv(tmp, "/tmp/foo.csv", quote=FALSE, row.names=FALSE)
>data <- read.csv("/tmp/foo.csv")
>length(unique(
> This is all application specific and
> sort of beyond the scope of type.convert(), which now behaves as it
> has been documented to behave.
That's only a true statement because the documentation was changed to reflect
the new behavior! The new feature in type.convert certainly does not behave
Hi,
As Greg suggested, this new feature in type.convert certainly did surprise one
user (me), enough so that I had to downgrade back to 3.0.3 until our code was
modified to handle the new behavior.
Here's my use case: I have a function that pulls arbitrary financial data from
a web service call
R-Devel,
I store and retrieve a large amount of financial data (millions of rows) in a
PostgreSQL database keyed by date (and represented in R by class Date).
Unfortunately, I frequently find that a great deal of processing time is spent
converting dates from character representations to Date cl
this R CMD check warning about .Internal, or is there a
better way to write this code?
Thanks, Robert
-Original Message-
From: Duncan Murdoch [mailto:murdoch.dun...@gmail.com]
Sent: Wednesday, May 15, 2013 6:04 PM
To: McGehee, Robert
Cc: R-Devel (r-devel@r-project.org)
Subject: Re: [Rd]
R-devel,
I used the 'substitute' function to create labels for objects inside an
environment, without actually evaluating the objects, as the objects might be
promises.
However, I was surprised to see that 'substitute' returns the expression slot
of the original promise even after the promise h
rograms (QCQP), and I haven't yet seen a free R package
that can solve this kind of problem (e.g. max q'x - x'Qx subject to x'Qx <= B
and Ax=c).
Thanks again!
Robert
-Original Message-
From: Prof Brian Ripley [mailto:rip...@stats.ox.ac.uk]
Sent: Thursday, Apr
R-developers,
I have a binary R package built using R 2.14.1 that I would like to run on R
3.0.0. Unfortunately, the original source code is unavailable, so I cannot
rebuild the package as R 3.0.0 requires.
Is there a straight forward way of converting the package (.rdb, .rdx and .rds
files) in
.@r-project.org [mailto:r-devel-boun...@r-project.org] On
Behalf Of McGehee, Robert
Sent: Wednesday, April 25, 2012 5:19 PM
To: r-devel@r-project.org
Subject: [Rd] delayedAssign changing values
I'm not sure if this is a known peculiarity or a bug, but I stumbled across
what I think is
I'm not sure if this is a known peculiarity or a bug, but I stumbled across
what I think is very odd behavior from delayedAssign. In the below example x
switches values the first two times it is evaluated.
> delayedAssign("x", {x <- 2; x+3})
> x==x
[1] FALSE
> delayedAssign("x", {x <- 2; x+3})
R-devel,
I discovered a segfault in my R code that boiled down to my incorrect
use of the Recall() function embedded within a with() function. Since
segfaults are generally bad things, even when it's the user's fault for
writing nonsense code, I thought I'd pass along the offending code. I've
teste
I came across the below mis-feature/bug using match with POSIXlt objects
(from strptime) in R 2.11.1 (though this appears to be an old issue).
> x <- as.POSIXlt(Sys.Date())
> table <- as.POSIXlt(Sys.Date()+0:5)
> length(x)
[1] 1
> x %in% table # I expect TRUE
[1] FALSE FALSE FALSE FALSE FALSE FAL
R-developers,
In version R 2.11.0, weighted.mean was changed such that:
> weighted.mean(NA, na.rm=TRUE)
[1] 0
rather than NaN as in previous versions of R. I see a note in the NEWS
file indicates that weighted.mean was changed "so an infinite value with
zero weight does not force an NaN result."
I see that related to this thread, 'R CMD INSTALL' (like
'install.packages') also reads the .Rprofile before beginning. This
caused package installation headaches for me that developers should be
aware (as it was very difficult to debug).
I added a setwd() to my .Rprofile [for example: setwd("/tmp
Hello all,
It appears that for the simplest of S4 objects, z+1 does not equal 1+z.
Presumably this is a bug, as 1+z seems to make a malformed object (at
least malformed as an input to str).
Thanks, Robert
> setClass("test", representation("vector"))
[1] "test"
> z <- new("test", 1)
> identical(z+
ncoming"
bug is dated 25 May 2008, so perhaps others are having difficulty as
well. (cc: r-bugs)
Cheers, Robert
-Original Message-
From: McGehee, Robert
Sent: Monday, July 14, 2008 9:51 AM
To: [EMAIL PROTECTED]
Subject: sapply(Date, is.numeric)
R-developers,
The results below are in
Hello,
I wanted to suggest that the below method for split.Date be added to the
base library to significantly speed up splits with values of class Date.
In the below example I show a speed improvement of 175x for 1000 data
points. On a vector of size 1e6, the time difference was 22 minutes for
spli
Oops, as I just realized, var does have a 'use' argument in 2.6.2, so I
can just use Gabor's suggestion for var. Sorry for that Gabor.
-Original Message-
From: McGehee, Robert
Sent: Friday, May 16, 2008 11:20 AM
To: 'Gabor Grothendieck'
Cc: R-devel
Subject: R
o
check the argument list of var every time I use it.
if ("use" %in% names(formals(var)))
var(x, na.rm=TRUE, use="p")
else
var(x, na.rm=TRUE)
-Original Message-
From: Gabor Grothendieck [mailto:[EMAIL PROTECTED]
Sent: Friday, May 16, 2008 11:03 AM
To:
Hello all,
I just upgraded to R 2.7.0 and found that the behavior of 'var' and 'sd'
have changed in the presence NAs (this wasn't explicit in the NEWS file,
though I see it probably has to do with the change for cor/cov). Anyway,
I just want to make sure that it was intentional to produce an error
Hello,
I got bungled up by the fact that an infinite POSIXct object is
represented by NA, but is not, in fact, NA. While an infinitely large
POSIXct object seems strange, perhaps R should use the convention of
representing it as Inf rather than NA to avoid any confusion.
Cheers,
Robert
> x <- as.
puter's memory and swap space after repeated calls.
Thanks,
Robert
-Original Message-
From: Roger Peng [mailto:[EMAIL PROTECTED]
Sent: Friday, June 29, 2007 7:44 PM
To: McGehee, Robert
Cc: R-devel
Subject: Re: [Rd] saving objects with embedded environments
I believe this is intentiona
Hello,
I have been running linear regressions on large data sets. As 'lm' saves
a great deal of extraneous (for me) data including the residuals,
fitted.values, model frame, etc., I generally set these to NULL within
the object before saving off the model to a file.
In the below example, however,
Hello,
I have come across a troubling problem in which my call to crossprod
will occasionally produce NaNs. That is, a proper matrix cross-product
will be produced except that some of the matrix elements will
arbitrarily be NaN. For my purposes, this is extremely bad. On several
different R sessio
Is Sahotra's abuse sending a wishlist item to R-bugs, or is his error
phrasing a suggestion in the form of a question? It seems others have
commented on the inability to specify df for chisq.test (see:
http://tolstoy.newcastle.edu.au/R/help/05/01/10539.html), and adding an
option certainly seems li
Hello,
My work with large datasets slows down a fair amount in R 2.4.0 when I
mistakenly pass in a large dataset using an incorrect argument. That is,
the same error message for reporting an incorrect argument usage when I
pass in a 1e8 length matrix takes 3 minutes on R 2.4.0 versus 0.01
seconds o
allArgs <- as.list(mc[-1])
allArgs[[arg]] <- curArg + offset
e <- do.call("call", c(as.character(mc[[1]]), allArgs))
}
for (i in 1:length(e)) e[[i]] <- Recall(e[[i]], arg = arg, offset =
offset)
return(e)
}
-Original Message-
From: Thomas L
R-Developers,
I'm looking for some help computing on the R language.
I'm hoping to write a function that parses a language or expression
object and returns another expression with all instances of certain
argument of a given function altered. For instance, say I would like my
function, myFun to ta
I am not encountering segfaults on a 64-bit build of R 2.4.0 compiled
with gcc and g77 3.4.5 and ATLAS 3.6.0 on a Red Hat Athlon64 system.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Douglas Bates
Sent: Monday, October 16, 2006 10:26 AM
To: R Developme
ry changes to the package maintainer.
Best,
Robert
-Original Message-
From: Hin-Tak Leung [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 10, 2006 6:10 AM
To: [EMAIL PROTECTED]
Cc: McGehee, Robert; r-devel@stat.math.ethz.ch
Subject: Re: [Rd] Installing Rmpi on 64-bit Linux Athlon
No
Hello,
We have recently added a 64-bit 2 x Dual-Core Athlon server running Red
Hat Enterprise Linux AS release 3 to allow for processing of large data
sets (>4GB) in R. To integrate this server into our Linux cluster, I
have been trying (unsuccessfully) to use Rmpi/lam-mpi to parallel
process some
CanUse?
If the 'Suggests' field "lists packages that are not necessarily needed"
(Writing R Extensions), then why is the user required to have the
package installed to pass R CMD check? Likewise, if a CanMakeUseOf field
is added, then why would one choose to use Suggests at all? That is, is
there
Hello,
Is there a way to query whether R has been compiled using 32- or
64-bits? A certain memory-intensive simulation will need to be optimized
differently depending on the memory constraints of the architecture such
that it will run quickly in 64-bits, and will run within ~3GB under
32-bits. And
Definitely not a bug. You seem to expect seq.Date to have an entirely
different convention depending on whether you are at the beginning of
the month or at the end of the month, which does not seem reasonable to
me.
For instance, does adding a month to Feb 28th give March 28th or March
31st? Given
rom: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of McGehee, Robert
Sent: Wednesday, June 21, 2006 7:13 PM
To: R-devel
Subject: [Rd] Suggestion for all.equal.factor
R-Devel,
all.equal.factor gives a warning message when comparing vectors of
factors of different lengths. I suspect
R-Devel,
all.equal.factor gives a warning message when comparing vectors of
factors of different lengths. I suspect this to be unintentional as I
believe tests of valid factors should be comparable without a warning.
For example:
> x1 <- as.factor(LETTERS)
> x2 <- as.factor(LETTERS)[1:10]
> all.eq
I was recently browsing through CRAN's Finance task view to remind
myself of the publicly available packages relevant to my work. As the
reference manuals are all online, I am able to flip through the
available functions to get an idea of the package's scope before
downloading.
That said, many au
I believe the paper on which those lecture notes were based can be found
here:
http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Drafts/BatesDebRoy.pdf
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ross Boylan
Sent: Thursday, May 18, 2006 1:45 PM
To: R De
I glanced at the .leap.seconds object and noticed that it has not been
updated for the most recent leap second that occurred 2005 December 31,
23h 59m 60s. See the IERS bulletin here:
http://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
Moreover, after a more careful glance at the .leap.seconds obje
Not an R function, per se, but
> system("uname -n", intern = TRUE)
returns my computer's network node hostname on both Windows and Linux.
You can use 'uname -a' for more information.
-Original Message-
From: Duncan Murdoch [mailto:[EMAIL PROTECTED]
Sent: Friday, December 09, 2005 9:31 AM
, everyone who needs to edit this file can just do
so in emacs, and putting quotes around the fields is an easy fix. Thanks
Robert
-Original Message-
From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
Sent: Friday, October 21, 2005 9:59 AM
To: McGehee, Robert
Cc: r-devel@stat.math.ethz.
Thanks for this.
I tried switching the file extension from txt to tab, but it seems to
still split on whitespace rather than tabs.
My goal is to create a file that is both readable by R and by a
spreadsheet program, and that may contain white spaces. If tab-delimited
separation is not currently
y [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 29, 2005 4:16 PM
To: McGehee, Robert
Cc: r-devel@stat.math.ethz.ch
Subject: Re: [Rd] write.csv suggestion
The help page says
By default there is no column name for a column of row names. If
'col.names = NA' and 'row.nam
Hello all,
I had some trouble recently with write.csv because I couldn't change one
of the default options. A quick view of the code showed that the
function was not defined in the most optimal way.
Currently,
write.csv <- function (..., col.names = NA, sep = ",", qmethod =
"double")
wri
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