Displaying 20 results from an estimated 4000 matches similar to: "numeric equality"
2008 Dec 11
1
How to generate a prediction equation for a stratified survival model that was fitted by cph() in Design package
Dear all,
I used cph() function from Frank harrell's Design package to create a
survival model, then used functions 'Function' and 'sascode' to generate
prediction equation based on the saved survival model. But it failed. I
included a stratified variable in the model. If I removed the
stratification, they were working well. Does that mean that function
'Function'
2009 Feb 13
2
Identifying graphics files produced by R
Oftentimes, I see graphs on the web that *look* like they've been
produced by R, but I can never be sure. Or can I? I notice that
PostScript files include a "%%%Creator: R Software" line, but do R
graphics drivers encode any identifying information in GIF or PNG
files more commonly used on the web? And of so, would such evidence
necessarily be obliterated in post-processing (e.g
2009 Oct 21
5
News on R "s largest corporate partner REVolution Computing and SPSS CEO:
Start the REvolution without me...
http://danesecooper.blogs.com/divablog/2009/10/start-the-revolution-without-me.html
*From Danese Cooper's Blog*
Some of you may have become aware of REvolution
Computing<http://revolution-computing.com/>,
a commercial open source company organized around the R
Language<http://www.r-project.org/>,
when I joined in March
2009 Feb 06
2
does R plus 3.3 need vista ?
Hi all - has anyone ot and experienced problems with R+.
Have downloaded the trail and it will not work -does it need vista (like it
says on the box!)
Thanks
glenn
[[alternative HTML version deleted]]
2009 Oct 04
1
multicore - no parallel
Hi everyone,
Thanks for the help in advance. I just want to know if there is absolutely
any way of using multicore if my loop can't run in parallel as each
iteration depends on the previous iteration. I have Windows R 2.9.2 and
REvolution R Enterprise 2.0 for Windows 64 bit. I also have if necessary R
on Ubuntu. 8gb of ram and a core 2 duo processor but I could use a quad core
as well.
Many
2009 Sep 24
2
more strange behavior of Revolution R 1.3.0
It runs more than twice as slowly using 8 core than using a single core
in inverting large matrix. Tested on 8 core Windows XP 64 machine.
> n = 1000
> n.simu = 100
> func1 = function()
+ {
+ x = rnorm(n*n)
+ dim(x)=c(n,n)
+ y = solve(x)
+ }
>
> setMKLthreads(1)
> system.time(for(i in 1:n.simu) func1())
user system elapsed
69.48 2.42 71.91
2009 Oct 23
3
How to make R packages?
I found the following document on making R packages. But it is old.
I'm wondering if there is more current ones and hopefully more
complete ones.
http://biosun1.harvard.edu/courses/individual/bio271/lectures/L6/Rpkg.pdf
2009 Sep 17
2
Which one shall I use? '=' or '<-'?
Hi,
I was told to use "<-" instead of "=" in the mailing list. I am
wondering what the difference between them?
Regards,
Peng
2009 May 01
1
Last month on the Revolutions blog
I write about R every weekday at?http://blog.revolution-computing.com
. In case you missed them, here are some articles from the month of
April of particular interest to r-help subscribers. Thanks to everyone
who has been following the blog and sending me messages and/or leaving
comments -- it always brightens my day to hear from readers!
http://tinyurl.com/cy7x9a?(from April 1) announced the new
2009 Jul 30
3
R User Group listings
There are now several R geographic user groups, and a few have mailing
lists on the R mailing list system. Thanks to Martin M, there's also a
pointer to a page I'm maintaining to list/describe the groups. The page
is at
http://macnash.telfer.uottawa.ca/RUG.html
Contact me if you have a listing. I'm prepared to wikify it if there is
sufficient interest.
John Nash
2009 Jul 01
1
Are there any bloggers amoung us going to useR 2009 ?
*(note*: This is an R community question, not a statistical nor coding
question. Since this is my first time writing such a post, I hope no one
will take offence of it.)
Hello all,
I will be attending useR 2009 next week, and was wondering if there are any
of you who are *bloggers *intending to participate and report on useR 2009?
If so - I would love to know your blogs URL so as to follow you.
2009 Mar 11
2
Building R for Vistax64
Hi all,
I have successfully built from source the 32-bit version of R on my
Vista 64-bit box. I was hoping to graduate to a 64-bit version so I
could analyze some larger data sets. I have 8gb RAM installed.
I downloaded the latest 64-bit versions of Perl and MinGW but wasn't
sure how to edit the source code to have it build using the 64-bit
versions. I did change my PATH variable to
2009 Jul 01
2
Revolutions blog: June roundup
I write about R every weekday at http://blog.revolution-computing.com
. In case you missed them, here are some articles from last month of
particular interest to R users.
http://bit.ly/tygLz announced the release of the "foreach" and
"iterators" packages on CRAN, for simple scalable parallel programming
in R.
http://bit.ly/FDS67 linked to Thomas Levin's Joy-Division-esque
2009 Oct 05
1
Characters vs. factors
It seems like a recent trend in R has been to make character vectors
and factors almost equivalent (apart from the way that factors always
remember their original range). There are a few exceptions:
* summary.character != summary.factor
* table(x, exclude = NULL) != table(factor(x), exclude=NULL) when x
includes missing values
* strsplit on a factor
> strsplit(factor(c("a",
2009 Jan 08
3
Regarding Books on R
Hi,
I have good understanding on Econometrics and statistical techniques.
However, I am new to R. What would be the best way to learn R as I would
be one of the few in my team started exploring R in your team. I have got a
few downloads on R introduction, but I am not a FAN of online reading. Can
some one guide me with some books on R and statistical models using R.
Sincere thanks.... And
2009 Jun 22
3
What has happened to the R-Help Google Groups Archive? Alternative?
Greetings,
I usually read this mailing list through google groups
(http://groups.google.com/group/r-help-archive), but when I opened the
webpage this morning it said: "The group named r-help-archive has been
removed because it violated Google's Terms Of Service."
Is there an alternative website which uses a similar structure to
google groups? I had a quick browse on the R Wiki
2009 Aug 30
1
Combining: R + Condor in 2009 ? (+foreach maybe?)
Hello dear R-help group (and David Smith from REvolution),
I would like to perform parallel computing using R with Condor (hopefully
using foreach or other recommended solutions, if available) for some
"Embarrassingly parallel" problem.
I will start by listing what I found so far, and then go on asking for help.
So far I found the a manual by Xianhong Xie from Rnews_2005-2 (see page
2008 Jul 17
4
REvolution computing
Hi, everybody. Sorry to bring up the subject again but I have visited the revolution computing web page, but its not clear when or what will be the new release be. Does anybody have information about that?. Does anybody know if the version that will be released will be validated?. I have been reading the previous mails about validation and I work in a Pharma company and validation is a big
2009 Jul 20
2
I might be dumb : a simple question about "foreach"
Hi list,
My attention was drawn to the foreach package by recent posts...I
decided to have a look...
I'm using R.2.9.1 on Windows, I have downloaded the foreach package
today (v 1.2.1), together with iterators (v. 1.0.1) and codetools (v.0.2-2).
Full of hope I try the most simple thing of all out of the package
vignette :
> x <- foreach(i = 1:3) %do% sqrt(i)
and get :
> Erreur
2009 Oct 05
4
Ubuntu, Revolutions, R
For those who don't follow Ubuntu development carefully, the first Beta for the
next Ubuntu was recently released, so I took my home system and upgraded to
help out with filing bugs, etc.
Just to be clear, I am not looking for help with the upgrade process. I've had
R, and a few miscellaneous CRAN packages installed on this computer for years.
Today, when I loaded an R session I had