Displaying 20 results from an estimated 100 matches similar to: "randomForest training error"
2008 Jul 03
1
randomForest.error: length of response must be the same as predictors
My data looks like:
A,B,C,D,Class
1,2,0,2,cl1
1,5,1,9,cl1
3,2,1,2,cl2
7,2,1,2,cl2
2,2,1,2,cl2
1,2,1,5,cl2
0,2,1,2,cl2
4,2,1,2,cl2
3,5,1,2,cl2
3,2,12,3,cl2
3,2,4,2,cl2
**The steps followed are:
trainfile <- read.csv("TrainFile",head=TRUE)
datatrain <- subset(trainfile,select=c(-Class))
classtrain <- (subset(trainfile,select=Class))
rf <- randomForest(datatrain, classtrain)
2008 Jul 03
1
Migrating from S-Plus to R - Exporting Tables
Does something like this get you close:
x <- list()
keys <- LETTERS[1:6]
# create
for (i in keys){
x[[i]] <- data.frame(a=1:5, b=1:5, c=1:5)
}
# output
output <- file('tempxx.txt', 'w')
for (i in keys){
write.table(i, row.names=FALSE, col.names=FALSE, file=output, quote=FALSE)
write.table(x[[i]], file=output, quote=FALSE)
}
close(output)
On Wed, Jul 2,
2010 Feb 18
3
svm regression
Hi,
I am trying to use svm for regression data.
this is how my data looks like:
>dataTrain
x y z
1 4 6
2 5 4
3 7 5
>classTrain
a
2
3
4
>dataTest
x y z
1 7 2
2 8 3
>classTest
a
3
4
5
building the model
model<-svm(dataTrain,classTrain,type="nu-regression")
pred <- predict(model, dataTest)
> pred
1 2
3.008842 3.120078
I
2008 Jun 17
1
Trouble with FUN(newX[, i], ...)
Hi,
I am trying to train svm with some training data of about 4000 rows and 4000
columns. While running svm function I am ending up with the following error.
trainfile <- read.csv('0_train_0016435.csv',head=TRUE,na.strings = "NULL")
datatrain <- subset(trainfile,select=c(-Class))
model <- svm(datatrain, kernel="radial")
Error in FUN(newX[, i], ...) :
2008 Mar 07
2
training svm
What should I do if I need to train svm() with data having same value across all rows in some columns. These must be the important features of the class and we cant exclude these columns to build up models.
The error I am getting is:
Error in predict.svm(ret, xhold) : Model is empty!
In addition: Warning message:
In svm.default(datatrain, classtrain) :
Variable(s) 'F112' and
2011 Feb 23
0
svm(e1071) and scaling of weights
I expected, that I will get the same prediction, if I multiply the
weights for all classes with a constant factor, but I got different
results. Please look for the following code.
> library(e1071)
> data(Glass, package = "mlbench")
> index <- 1:nrow(Glass)
> testindex <- sample(index, trunc(length(index)/5))
> testset <- Glass[testindex, ]
> trainset <-
2008 Jul 15
3
playwith package crashes on Mac
Dear R-helpers,
I tried the playwith packages for the first time, and it crashed R:
> require(playwith)
Loading required package: playwith
Loading required package: lattice
Loading required package: grid
Loading required package: gWidgets
Loading required package: gWidgetsRGtk2
Loading required package: RGtk2
Loading required package: cairoDevice
> sessionInfo()
R version 2.7.1
2009 Jun 08
6
Strange indices of support verctors from e1071
Hello,
In the attached file training.csv (I apologize for the large file) I
have 238 objects belonging to 13 classes, which are described by 183
properties. I would like to find a svm model for these objects.
I tried the following R statements.
library('e1071')
datatraining <- read.csv("training.csv",head=TRUE)
names<-names(datatraining)
print("before
2005 Jul 06
1
Error message NA/NaN/Inf in foreign function call (arg 6) when using knn()
I am trying to use knn to do a nearest neighbor classification. I tried using my dataset and got an error message so I used a simple example to try and understand what I was doing wrong and got the same message. Here is what I typed into R:
try
[,1] [,2] [,3] [,4]
r "A" "A" "T" "G"
r "A" "A" "T" "G"
f
2011 Sep 14
1
S4 method dispatch
List,
In order to get rid of some old, unreadable S3 code in package sp, I'm
trying to rewrite things using S4 methods. Somewhere I fail, and I
cannot sort out why. In order to isolate the problem, I created two
functions, doNothing<- and dosth, and both should do nothing. The issue
is that in most cases they do nothing, but in some cases dosth(obj)
changes the class of obj and breaks with
2011 Jun 21
1
plot error bars on skyline plot
Hi,
I have generated a skyline plot of a tree in newick format using "ape".
How can I plot the error bars for this graph?
I only have the the tree data.
un<-"((((8.1:0, 20.1:0):0, 6.1:3):123, (((((35.1:0, (22.1:0, (43.1:1,
29.1:0):0):0):4, 25.1:6):0, ((42.1:0, 21.1:0):3, (39.1:0, 2.1:0):3):1):8,
(3.1:0, 7.1:0):8):48, (((((15.1:0, 14.1:0):0, 11.1:0):0, 37.1:0):0,
2004 May 05
1
Segfault from knn.cv in class package (PR#6856)
The function knn.cv in the class package doesn't have error checking to
ensure that the length of the classlabel argument is equal to the number
of rows in the test set. If the classlabel is short, the result is often
a segfault.
> library(class)
> dat <- matrix(rnorm(1000), nrow=10)
> cl <- c(rep(1,5), rep(2,5))
> cl2 <- c(rep(1,5), rep(2,4))
> knn.cv(dat, cl)
[1] 2
2008 Mar 18
3
Partition data into clusters
Greetings R-users,
I have been using the fpc package in R to cluster my data. Speficically I am
using kmeansruns clustering.
I would like to know how I use R to partition data into clusters. What I am
doing is as follows.
# Use csv file as input
#####################
wholeset = read.csv("Spellman800genesImputed.csv")
# exclude first col (gene names)
##########################
2012 Apr 06
1
Execution speed in randomForest
I am using the randomForest package. I have found that multiple runs
of precisely the same command can generate drastically different run
times. Can anyone with knowledge of this package provide some insight
as to why this would happen and whether there's anything I can do
about it? Here are some details of what I'm doing:
- Data: ~80,000 rows, with 10 columns (one of which is the
2005 Apr 29
0
recording packet sent time
Hello
I am writing a qdisc scheduler (called fb in the diagram) that does certain
packet delaying and other stuff. (for egress traffic)
root (htb/tbf)
|
---------------
cl1 cl2 |
tbf
--------
| |
cl3 cl4
| |
*fb* fifo
Now I need to
2006 Jan 15
0
Samba Migration
Hi all,
I have a Samba system running on a standard purchased SuSE Linux 9.3
box. I want to transfer the data to a new Samba running on a standard
Suse Linux 10.0 purchased box version, on a x86_64 cluster platform. The
new configuration is as follows:
I have one central SuSE Linux 10.0 server cluster for all data. It
exports as NFS-Server several shares to a number of NFS-Clients. (The
2004 Mar 29
1
StepAIC
Dear list,
here is an example of stepAIC that I do not understand.
The data is n=42, Lage is the only factor and there are four other
variables treated as continuous.
First you see the stepAIC-forward solution (fs7). The strange thing here
is that apparently not all interactions are tried for inclusion, but only
WQ:Lage. In particular, I think that WFL:Lage should be tried
in the last two
2012 May 25
0
plotting sorted factors
Hello,
The problem is that the factors are not orderd by the row number. If you
want to check their order, use
str(sortdata)
and you'll see Santa-Rosa was attributed factor level 4 (in the output,
first variable, the 3rd and 4th).
Try the following.
sortdata <- read.table(text="
county year x1 x2 x3 x4 x5 x6 x7 rank
141 Escambia 2002 6.50
2005 Jun 29
3
Memory Management under Linux: Problems to allocate large amounts of data
Dear Group
I'm still trying to bring many data into R (see older postings). After solving some troubles with the database I do most of the work in MySQL. But still I could be nice to work on some data using R. Therefore I can use a dedicated Server with Gentoo Linux as OS hosting only R. This Server is a nice machine with two CPU and 4GB RAM which should do the job:
Dual Intel XEON 3.06 GHz
2016 Oct 07
3
RuntimeDyLdCOFF and RTTI on Windows
HI Stefan,
CC'ing Reid Kleckner, who might have some insight here, and llvm-dev as
this may be of interest to other windows JIT users.
I am facing the issue that C++ dynamic_cast doesn't work for types
> loaded from object files with RuntimeDyLd.
<snip>
Do you think it is possible that RuntimeDyLd misses type info data in
> the COFF file or doesn't wire it up