Displaying 20 results from an estimated 10000 matches similar to: "all(logical(0)) and any(logical(0))"
2002 Oct 04
1
items in Rd file
Dear R-devel,
I'm encountering a strange problem in a Rd file that I'm working on. In the
"Value" section, I have something like:
=====================
\value{
An object of class \code{randomForest}, which is a list with the
following components:
\item{call}{the original call to \code{randomForest}}
...
For classification problem, the following are also included:
2004 Jan 09
2
debugging strange segfault
Dear R-devel,
Can anyone give me some hints on how to go about debugging a strange
segfault in my randomForest package? Here's the scoop:
A user reported segfault when running predict() in the randomForest package.
I asked for the data and code. The combination runs fine under WinXPPro,
but does give segfault on one of our Linux boxes running R (1.7.0 through
R-devel_2004-01-08) on
2004 Oct 20
7
Q about strsplit and regexp
Dear R-help,
This one is probably a piece of cake for regexp masters. I'd like to split
a character vector (for simplicity, say of length one for now) that contains
fields that are delimited by arbitrary number of white spaces (e.g., " a b
c "). How do I get the character vector that contain the fields? In the
example I gave, I've tried:
> strsplit(" a b c
2006 Nov 30
1
strange error from R CMD check about xaxp
Dear R-devel,
Kurt had alerted me to the problem that the randomForest package that I
maintain has been failing checks in R-devel. However, I just can't see
why or where it's failing. I'd very much appreciate any pointer.
The failure occur when running the example code in varImpPlot.Rd:
> varImpPlot(mtcars.rf)
Error in par(opar) : invalid value specified for graphical parameter
2003 Jun 23
2
Lwd ignored when printing on Windows
Dear R-help,
Has anyone notice the problem that, on Windows (NT and XP), when printing a
graph using the "File -> Print..." menu in the graphics window to print the
graph, that line width seemed to be ignored in the printed output? For
example, if I make a plot with plot(1:10, type="l", lwd=5), it looks right
on screen, but when printed out using the menu, it looks like
2005 Feb 07
5
R on Beowulf cluster?
Dear R-help,
Has anyone tried running R on a Beowulf-type cluster? I can get R to run in
batch (using R CMD BATCH) on a cluster, but am wondering if it is possible
to get an interactive R session on a compute node. Right now, if I run:
beorun --nolocal R
I just get the R start-up message and back to the shell prompt. If I try
bpsh 0 R
I can get R started (but the R prompt does not
2003 Aug 26
4
R on Linux/Opteron?
Dear R-help:
Has anyone tried using R on the the AMD Opteron in either 64- or 32-bit
mode? If so, any good/bad experiences, comments, etc? We are considering
getting this hardware, and would like to know if R can run smoothly on such
a beast. Any comment much appreciated.
Best,
Andy
Andy Liaw, PhD
Biometrics Research PO Box 2000, RY33-300
Merck Research Labs Rahway, NJ
2004 Mar 25
1
yet another fast BLAS (from AMD this time)
Dear R-devel,
Has anyone played with this?
http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_2282,00.html
<http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_2282,00.html>
.
I'll probably give it a shot...
Best,
Andy
Andy Liaw, PhD
Biometrics Research PO Box 2000, RY33-300
Merck Research Labs Rahway, NJ 07065
mailto:andy_liaw@merck.com
2006 Oct 03
3
how do I tell configure where to find Java? [Broadcast]
Before I do that, I would need to remove the gcj stuff that are in /usr/bin.
If I know how to remove gcj, I'd gladly do that. However, for the
particular version of the OS, the entire GCC seems to be bundled into one
rpm, and I could not remove just the gcj component. Neither do I wish to
mess with files that are part of some RPMs--- in my experience that's
invitation for trouble later.
2008 Jun 15
1
randomForest, 'No forest component...' error while calling Predict()
Dear R-users,
While making a prediction using the randomForest function (package
randomForest) I'm getting the following error message:
"Error in predict.randomForest(model, newdata = CV) : No forest component
in the object"
Here's my complete code. For reproducing this task, please find my 2 data
sets attached ( http://www.nabble.com/file/p17855119/data.rar data.rar ).
2005 Sep 23
1
undocumented objects in a package
Dear R-devel,
I recall that there used to be a mechanism to get around the requirement
that all objects in a package have associated documentation; i.e., a way to
specify a list of objects (mostly functions) that are not considered as part
of the package API. Is this still available? I cannot find any mention in
R-exts.
I realize that the way to go is to have a name space, and eventually
2008 Mar 19
1
how to exclude terms preceded by - from model frame
[I believe few users manipulate formulae and model frames like this, so
I'm posting here instead of R-help.]
I just found out that model.frame() includes all terms, including those
preceded by "-" in the formula, in its output (as mentioned on its help
page). Is there a recommended way of excluding "negative" terms? My
guess is that I can use info in the terms attribute
2005 Jan 10
1
help diagnosing ftp problem
Dear R-help,
I've been compiling R from source on our Linux boxes for quite a while. One
thing that bugs me is that I always get an error when make check-all where
it choked up running tests/internet.R. That wasn't a big deal, as I can run
install.packages()/update.packages() fine, and that's all I use the 'net
connection for. The problem is that it takes a _long_ time to fail
2004 May 10
7
strange behavior of names<-
Dear R-help,
I've encounter what seems to me a strange problem with "names<-". Suppose I
define the function:
fun <- function(x, f) {
m <- tapply(x, f, mean)
ans <- x - m[match(f, unique(f))]
names(ans) <- names(x)
ans
}
which subtract out the means of `x' grouped by `f' (which is the same as,
e.g., resid(lm(x~f)) if `f' is a factor).
2004 Dec 14
3
make check-all failed on SLES8 for x86_64
Hi all,
I've only now noticed that on our Opteron boxes running Suse Enterprise
Server 8 that R-2.0.1 did not pass make chek-all. It bombed in
tests/lapack.R at:
> eigenok <- function(A, E, Eps = 1000 * .Machine$double.eps) {
V <- E$vect
lam <- E$values
stopifnot(abs(A %*% V - V %*% diag(lam)) < Eps, .... [TRUNCATED]
> Ceigenok <- function(A, E, Eps =
2012 Oct 22
1
random forest
Hi all,
Can some one tell me the difference between the following two formulas?
1. epiG.rf <-randomForest(gamma~.,data=data, na.action = na.fail,ntree =
300,xtest = NULL, ytest = NULL,replace = T, proximity =F)
2.epiG.rf <-randomForest(gamma~.,data=data, na.action = na.fail,ntree =
300,xtest = NULL, ytest = NULL,replace = T, proximity =F)
[[alternative HTML version deleted]]
2004 Oct 26
2
need help debugging on Windows
Dear R-devel,
Apologies for bothering y'all with this seemingly perennial question. A
user reported problem with my most recent version of randomForest (4.4-1),
and I was able to reproduce it with his data with R-2.0.0 patched
(2004-10-24) on WinXP Pro. The problem is that it crashes R on Windows.
However, it does not happen on Linux (tried SUSE ES8 on our Opterons and
Quantian on my
2012 Mar 08
2
Regarding randomForest regression
Sir,
This query is related to randomForest regression using R.
I have a dataset called qsar.arff which I use as my training set and
then I run the following function -
rf=randomForest(x=train,y=trainy,xtest=train,ytest=trainy,ntree=500)
where train is a matrix of predictors without the column to be
predicted(the target column), trainy is the target column.I feed the same
data
2004 Mar 16
2
make check failed for R-1.9.0alpha (2004-03-16) when link against Goto's BLAS
Dear all,
Has anyone seen the same problem? I tried compiling R-1.9.0 alpha
(2004-03-16) on our Opteron box running SUSE Linux ES8. I ran:
./configure --enable-R-shlib --with-blas=goto
and got:
Source directory: .
Installation directory: /usr/local
C compiler: gcc -m64 -O2 -g -msse2 -march=k8 -Wall
--pedantic
C++ compiler: g++ -m64 -O2 -g
2004 Jan 20
1
random forest question
Hi,
here are three results of random forest (version 4.0-1).
The results seem to be more or less the same which is strange because I
changed the classwt.
I hoped that for example classwt=c(0.45,0.1,0.45) would result in fewer
cases classified as class 2. Did I understand something wrong?
Christian
x1rf <- randomForest(x=as.data.frame(mfilters[cvtrain,]),