Displaying 20 results from an estimated 3000 matches similar to: "Extract the accuracy of 10-CV"
2013 Mar 23
1
LOOCV over SVM,KNN
Good afternoon.
I would like to know if there is any function in R to do LOOCV with these
classifiers:
1)SVM
2)Neural Networks
3)C4.5 ( J48)
4)KNN
Thanks a lot!
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2013 Apr 08
1
Applying bagging in classifiers
Hello!
Does anyone know how to apply bagging for SVM? ( for example)
I am using adabag package to execute bagging but this method, "bagging",
works with classification trees. I would like to apply my bagging to other
classifiers as SVM,RNA or KNN. Has anyone do it?
Thanks!!
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2013 Apr 07
2
Working with createFolds
Hello!
I have a question. I am working with createFolds:
folds<- trainControl(method='cv', index=createFolds(data$Score,list = TRUE))
I need to iterate over folds to extract the indexes from each fold.
For example, if I do folds$index$Fold01, it contains:
5 11 17 29 44 50 52 64 65
I need to iterate over each $Fold_i to extract the indexes, but I can't do
it because I
2012 Feb 21
3
"CV" for log normal data
Hi, I have a microarray dataset from Agilent chips. The data were really log ratio between test samples and a universal reference RNA. Because of the nature of log ratios, coefficient of variation (CV) doesn't really apply to this kind of data due to the fact that mean of log ratio is very close to 0. What kind of measurements would people use to measure the dispersion so that I can compare
2004 Mar 08
3
Decision Trees
I am familiar with the rpart and tree packages for classification and
regression trees. However, quite a bit of the research in the
transportation community relating to decision trees uses the C4.5 family of
algorithms by Quinlan. Are there any plans to make a C4.5 (or a derivative
of it) available to R? If not, then I might use the WEKA Java package (
http://www.cs.waikato.ac.nz/ml/weka) that
2007 Nov 27
1
Questions on RWeka classifiers?
Hi,
I am using some classifiers in RWeka packages and met a couple problems.
(1) J48 implements C45 classifier, the C45 should be able to handle missing
values in both training set and test set. But I found the J48
classifier can
not be evaluated on test set with missing values--it just ignore them.
(2) The ensemble classifiers in RWeka such as bagging and boosting: there
is a
2013 Mar 31
1
Creating new instances from original ones
I have a question about data mining. I have a dataset of 70 instances with
14 features that belong to 4 classes. As the number of each class is not
enough to obtain a good accuracy using some classifiers( svm, rna, knn) I
need to "oversampling" the number of instances of each class.
I have heard that there is a method to do this. It consists in generating
these new instances as follows:
2008 Sep 02
1
rpart: ID3 or C4.5?
Hello,
My question is about the algorithm used behind decision tree package rpart.
It is not clear in the help if the algorithm used is ID3 or C4.5. Someone
has any idea?
Regards.
Sandro.
--
View this message in context: http://www.nabble.com/rpart%3A-ID3-or-C4.5--tp19269303p19269303.html
Sent from the R devel mailing list archive at Nabble.com.
2009 May 27
1
C4.5 implementation in R
Greetings,
Does anyone know if the C4.5 algorithm is already implemented in R? If yes,
please let me know the package. Thanks.
--
View this message in context: http://www.nabble.com/C4.5-implementation-in-R-tp23736785p23736785.html
Sent from the R help mailing list archive at Nabble.com.
2009 Jun 03
2
Problems with plot and Quartz device (PR#13744)
Full_Name: Thomas Richardson
Version: R 2.9.0 GUI 1.28 Tiger build 32-bit (5395)
OS: 10.4.11
Submission from: (NULL) (216.254.15.72)
I have encountered a problem with points in scatterplots disappearing in a
quartz window when it is re-sized (to make it larger).
I am constructing an 8x12 matrix of scatterplots each containing approx 600
points.
In order to get them in the window I remove the
2023 Jan 17
1
dovecot replication - new and cur folders on mx1 and mx2
It might have a noticeable effect on clients.
I encountered (probably triggered by this in some way?) that I was unable to het the 'read' bit set in macOS Mail.app. Maybe (as I am doing HA with round robin) the Mail.app client got to one dovecot repository on one tcp connection and then on the other.
Is there a reason why syncing tis move from new to cur is a bad idea?
Gerben Wierda
2023 Jan 06
3
Re: replicator: Panic: data stack: Out of memory when allocating 268435496 bytes
On January 6, 2023 3:56:39 AM GMT+02:00, Gerben Wierda <gerben.wierda at rna.nl> wrote:
>One step further in my quest to create a replacement mail server.
>
>I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new (2.3.20, Alpine Linux, Docker, apk package). When I turn on replication it works, but, after a while I see:
>
>Jan 06 00:50:31 replicator: Panic: data
2023 Jan 17
1
dovecot replication - new and cur folders on mx1 and mx2
I can confirm this in a slightly different setting, but still using two-way sync between two dovecots. On e is 2.3.19.1 running on macOS Monterey, the other is 2.3.20 running in an alpine container on Ubuntu.
Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>)
R&A IT Strategy <https://ea.rna.nl/> (main site)
Book: Chess and the Art of Enterprise?Architecture
2002 Mar 10
6
Newbie with R
Hello,
I would like to test some learning algorithms (C5.0, or C4.5) using decision trees or neural network.
I didn't find anything in the R documentation for functions to apply on datasets (well, English is not my mother tongue and I have some problems to understand some functions descriptions). Does anybody know where I can find anything about that ?
Thank you very much,
Thomas
2014 Oct 01
2
JOB - PhD position: applying HPC in cancer research
Dear all, we have an exciting PhD position applying HPC to the analysis of large scale cancer datasets.
The post will suit an applicant from a strong computational background who wishes to apply their knowledge to help develop a better understanding of the processes that control how tumours develop.
Details below:-
High Performance Computing applied to cancer research: Computational analysis of
2007 Jun 28
3
Vim differences between C4 and C5
I have installed CentOS 4.5 and 5 on 2 separate machines, and both have
default installs of vim-enhanced on each of them.
I noticed that I can get syntax highlighting as a regular user, sudo and
as root in C4.5. In C5 I only get highlighting as a regular user.
I diff'ed my /etc/vimrc files between each install there is no changes
and neither root ~ has a .vimrc file.
I had put "# vim:
2008 May 29
1
In fact this is a Stats question, but... "The return."
*Thanks* all those who took the time to help me (even if the
"question" was not related to - the use of - R).
Now I think I can soundly make my point w/ the referee (can I use your
replies? If so I intend to properly cite its use?!?).
Regards, Eduardo Esteves
ps - Sorry for not explaining the "biological details" of my posting:
RNA/DNA is the ratio of RNA content to
2005 Apr 21
1
lda (MASS)
hi!
this is a question about lda (MASS) in R on a particular dataset.
I'm not a specialist about any of this but:
First with the well-known "iris" dataset, I tried using lda to discriminate
versicolor from the other to classes and I got approx. 70% of accuracy
testing on train set. In iris, versicolor stands "between" the 2 other so
one can expect lda not to perform well
2013 May 17
2
zigzag confidence interval in a plot
Dear All,
When I plot the values and linear regression line for one data set, it is fine. But for another one I see zigzags, when I plot the confidence interval
>cd
Depth CHAOsep12RNA
9,94 804
25,06 1476,833333
40,04 1540,561404
50,11 1575,166667
52,46 349,222222
54,92 1941,5
57,29 1053,507042
60,11 1535,1
70,04 2244,963303
79,97 1954,507042
100,31 2679,140625
>
2014 Feb 27
4
nut in openwrt
2014-02-25 10:12 GMT+01:00 Virgo P?rna <virgo.parna at mail.ee>:
> On Sun, 23 Feb 2014 19:39:02 +0100, Josu Lazkano <josu.lazkano at gmail.com> wrote:
>>
>> # dmesg
>> ...
>> [181041.636190] usb 4-4: new low-speed USB device number 2 using ohci_hcd
>>
>
> I recently read about openwrt (for one of the routers I own). And there was a
>