Displaying 20 results from an estimated 6000 matches similar to: "RE: [R] ^ operation much slower in R 1.7.1 than in R 1.7 .0 ???"
2003 Aug 05
0
RE: [R] ^ operation much slower in R 1.7.1 than in R 1.7 .0 ???
I used the packaged "MinGW-2.0.0-3.exe" exactly as specified on
http://www.stats.ox.ac.uk/pub/Rtools/ - in fact I used these recommendations
throughout.
According to the release notes MinGW version 2.0.0 contains the following
list of packages:
GCC-3.2-core-20020817-1
binutils-2.13-20020903-1
mingw-runtime-2.2
w32api-2.0
gdb-5.1.1-1
make-3.79.1-20010722 (binary renamed as mingw32-make)
2003 Aug 04
7
^ operation much slower in R 1.7.1 than in R 1.7.0 ???
I do not understand what happens here (under Win XP):
a <- abs(matrix(rnorm(800*800)/2, ncol=800, nrow=800))
system.time(b <- a^1000)[3]
took about 1 sec on my computer with R 1.7.0 and it takes now 4.59 sec with
R 1.7.1
Similarly,
phi <- 1.6180339887498949
a <- floor(runif(750000)*1000)
system.time(b <- (phi^a - (-phi)^(-a))/sqrt(5))[3]
took about 0.9 sec with R 1.7.0, and it
2003 Aug 04
7
^ operation much slower in R 1.7.1 than in R 1.7.0 ???
I do not understand what happens here (under Win XP):
a <- abs(matrix(rnorm(800*800)/2, ncol=800, nrow=800))
system.time(b <- a^1000)[3]
took about 1 sec on my computer with R 1.7.0 and it takes now 4.59 sec with
R 1.7.1
Similarly,
phi <- 1.6180339887498949
a <- floor(runif(750000)*1000)
system.time(b <- (phi^a - (-phi)^(-a))/sqrt(5))[3]
took about 0.9 sec with R 1.7.0, and it
2003 May 28
2
R Enhancements
Hi,
We - Venkatesh Mysore and Salvatore Paxia of the New York University's Bioinformatics Group under Prof.Bud Mishra - have been working on enhancements to R for a while now.
We're happy to announce that we have some good stuff up and running now:
1. A debuggable Microsoft Visual C version ( _MSC_VER) of R-1.7.0: R-1.7.0-msc (YES !!!!)
2. COM/OLE-support that will allow invoking of
2003 Jul 11
2
unz()
I am having problems getting the unz() function to work as a connection to
start reading a file...
z <- unz("c:/temp/stoxx.zip", "close_tmi_components.txt", "r")
readLines(z,2)
yields the following problems:
> z <- unz("c:/temp/stoxx.zip", "close_tmi_components.txt", "r")
Error in unz("c:/temp/stoxx.zip",
2003 Jul 30
2
building packages using S4 methods
I have been building a package around a sequence of S4 classes which I have
coded in separate *.R files in the "./R" subdirectory of the package.
The package builds without error, but when I load it in R I get:
Error in reconcilePropertiesAndPrototype(name, slots, prototype,
superClasses) :
Class "xxxx" extends an undefined class ("yyyyyy"
I guess R is trying to
2003 Nov 03
2
POSIXct under R-1.8.0 with Methods package
I am having problems porting a package to R-1.8.0 where I have complex S4
classes with slots inheriting from POSIXct. For example:
> setClass("test1", representation(date="POSIXct"))
[1] "test1"
> new("test1", date=as.POSIXct("2003-10-09"))
Error in ext@test(object) : couldn't find function "%in %"
Under R-1.7.1 this worked
2003 Nov 12
1
Power (^) 10x slower in R since version 1.7.1... What next?
OK, I have made a little search about this "problem" that apparently occurs
only on Windows platform... (but I am sure most of you are already aware of
it): the slow down is due to the adoption of a different algorithm for pow
in mingw 3.x. This is motivated by some other changes in mingw. Here is a
quote of Danny Smith that did this change:
>When mingw changed default FPU settings
2003 May 19
3
how to run R as a daemon
Hi all,
Using R a as a real-time application called by Php for a website, I
would like to run one R process only, which would manage user
connections. For the time each user who asks for an analysis causes a
new R process to start, which is not suitable in prevision of many
users. R needs about 30 seconds to run the script which makes the
analysis. The problem is that this waiting time is n
2003 May 13
2
RMySQL crashes R
I have justed upgraded R v1.7.0 on Windows NT 4 and have installed the
latest RMySQL (version 0.5-1)and DBI (version 0.1-5) packages.
When I issue the following commands (tactfully adjusted) R just crashes and
disappears, any ideas?
require(RMySQL)
m <- dbDriver("MySQL")
con <- dbConnect(m, dbname="xxx", user="xxx", password="xxx",
2003 Sep 17
2
possible bug in diag()
It concerns trival diagonal matrices:
> diag(1)
[,1]
[1,] 1
> diag(rnorm(1))
<0 x 0 matrix>
> diag(rnorm(1),nrow=1)
[,1]
[1,] 0.4843697
There's an obvious work around... but I thought it was worth notifying the
list.
Regards,
John Marsland
**********************************************************************
This is a commercial communication from
2003 Dec 03
1
Rblas for dual Xeon
Does anybody have a tuned Rblas.dll compiled against ALTLAS for a dual Xeon
system?
Unfortunately, we have very strict security that does not allow compilers of
any sort on production desktops - we only have Pentium III development PCs.
Regards,
John Marsland
**********************************************************************
This is a commercial communication from Commerzbank AG.\ \
2004 Oct 26
1
Problem with make recommended
I have been having problems making the recommended packages under windows NT
when WINHELP is set to NO. It seems to go ahead and create the chm files and
then fall over with an error. The base packages work fine.
Clearly I can fix this myself messily, but I thought it might be useful
feedback.
Regards,
John Marsland
_
platform i386-pc-mingw32
arch i386
os mingw32
system
2003 Sep 30
3
Adding Tk extensions to R for windows
Hi,
I'm developing an R/TclTk application which uses the BWidget and
Tktable Tk extensions and I'm trying to make it easy to install.
For now, I'm focusing on Windows users who start with nothing.
I have built Tcl/Tk and Tktable for windows using Msys/MinGW.
(BWidget contains only Tcl scripts so does not need building.)
I have then copied Tktable and BWidget into the lib subdirectory
2003 Nov 06
2
GDB under windows
Does anybody have some simple instructions to get me going using the GNU
debugger GDB under windows with R?
The R Extensions manual mentions briefly debugging under unix, but I've seen
seen GDB mention in the Bloodshed Dev C++ IDE so it should be possible to
use it with R?
Regards,
John
[Using R-1.8.0 under Windows NT 4.0]
2004 Feb 27
2
Packages in R & Java
Yes, lots of packages do use C/Fortran code ... it would be great if there
were more packages that are "pure R" especially since the advent of S4
classes and namespaces.
Is it worth suggesting that we create a designation "pure R" for packages
that have no external source code and encourage more of these? Indeed, now
the number of packages is so big could they be classified to
2003 Jul 18
4
R won't connect to the internet
Hi
I can't get R to connect to the internet. I am running R 1.7.1 on Windows XP and whenever I try to download packages etc from within R using the internet, it fails.
OK so I am behind a firewall and use a proxy server....
SO, if I go to my MS-DOS prompt and type:
RGui.exe --internet2
everything works....
BUT i can't set up a shortcut for this as Windows (I hate Windows) complains
2003 Aug 05
3
s4 methods and base
I'm sure that many people are in the same position as me in that they are
trying to write packages and code that is vaguely "future proof".
Would it be possible to get some guidance on how the R-core team see the
evolution of the "base" package with regard to s4 methods.
There seem to be quite a lot of inconsistencies between s3 and s4 methods
and classes currently and
2003 Jun 10
1
c(...) and methods
I have been writing some S4 classes and have a problem about how I might
pass a signature to "c()".
Take the following example:
setClass("collection", representation("list", date="POSIXt"))
x <- new("collection", list(1,2,3), date=Sys.time())
y <- new("collection", list(4,5,6), date=Sys.time())
obviously, I can do c(x,y), but
2003 Apr 24
1
RMySQL crash under R 1.7.0, but not 1.6.2
Hi,
I was able to connect to a MySQL database (called "zooscan" and with a table
"serie" under Win XP with R 1.6.2 using:
> library(DBI)
> library(RMySQL)
Warning message:
DLL attempted to change FPU control word from 8001f to 9001f
> drv <- dbDriver("MySQL")
> con <- dbConnect(drv, dbname="zooscan")
> dbExistsTable(con,