Displaying 20 results from an estimated 2000 matches similar to: "outlier detection test for large data set"
2009 May 08
3
'Dynamic' 3D plot
Hi,
I am looking for a R package to draw 3d plot. But not in a static way like scatterplot3d or stuff like that. I would like to make rotate the plot, to zoom/unzoom etc..., actually to render the graph 'dynamic'... (for the biologist and bioinformatician, a R package which permitts to reproduce what pdb viewer does).
Does a Way exist to do something like that in R ?
Thanks,
2009 Jun 01
0
vectorizing a double loop
Hello,
I have to build a function that takes a time serie and calculate the momentum. For each date of the serie, I have to build a loop to calculate it using the last few data.
My problem is that it takes one minute to compute and I need to run this function very often.
I would like to vectorize it, as much as possible.
Can somebody help me? I have read the
2009 Jun 17
1
shall I uninstall an old R installation in advance of installing a new one ?
I have resumed developing R code on SuSE/Linux version 11.1
I installed the latest 64-bit R version available for my platform.
Accidentally I figured out I still had an old R installation that, surprisingly, was not wiped out
by the new SuSE installation from scratch.
I suspect the new and old R versions got mixed up.
I would greatly appreciate some suggestions about restarting from scratch a
2009 Jun 18
3
R function found in two packages !
Hi,
Is there a mean to automatically choose one version of the 'rbind' function ? By default, R chose the 'rbind' from {base}, i would lke to use the one from {IRanges}...
Is it possible to set that using 'par' ?
> ?rbind
Help on topic 'rbind' was found in the following packages:
Package Library
IRanges
2009 Jun 02
10
Most used R editors
Hi,
I am a little lonely as R users in my group. So, I would like to know which editor is the most used in the R community.
This post is some kind of survey.
Personally, I use Emacs with ESS, It permits to :
- open more than one R session
- split the emacs editor as many part as you want.
- use a lot of keybindings.
...
I also tried Rkwards, Scilab (windows), JGR etc... but they are not
2009 Dec 08
2
automated image processing
Hi,
I am looking for a R package which is capable to process and analysis pictures of tissues (stained) in an automatic way.
I had a look on biops and EBImage (Bioconductor) but they are not automatic...
Did you already use/know a such package ?
Thanks,
- Martial
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2009 Jun 17
1
Unable to use jpeg(), png() etc.....
Hello,
I 've just re-installed R 2.9.0 on ubuntu 9.04.
I do not understand why I am unable to use simple device function such as jpeg(), png()...
> png()
Error in X11(paste("png::", filename, sep = ""), width, height, pointsize, :
unable to start device PNG
In addition: Warning message:
In png() : no png support in this version of R
> capabilities()
jpeg
2009 May 13
1
access to the current element of lapply
Dear All,
I would like to use the 'split' function on the dataframe elements contained in a list L.
For example :
> (df <- data.frame(cbind(c(rep('A',2), rep('B',2)), rep(1:4))))
X1 X2
1 A 1
2 A 2
3 B 3
4 B 4
> (L<-split(df, df$X1))
$A
X1 X2
1 A 1
2 A 2
$B
X1 X2
3 B 3
4 B 4
Now, I would like to split EACH data frame, ie, according to
2000 Apr 21
1
outlier detection methods in r?
hi -
if I sample from a normal distribution with something like
n100<-rnorm(100,0,1)
and add an outlier with
n100[10]<-4
then
qqnorm(n100)
visually shows the point 4 as an outlier
and calculating the probablity of a value of 4 or bigger in 100 samples of norm(0,1)
gives
> 1-exp(log(pnorm(4,0,1))*100)
[1] 0.003162164
If I have more than 1 sample above outlier threshold the math is a
2009 Sep 12
1
medcouple-based outlier detection in R
I need to detect outliers in a large data set which is highly right-skewed. I plan to use medcouple-based outlier detection. Is there any support for medcouple-based outlier detection in R? Are there any other routines in R to perform outlier detection in highly right-skewed data?
Manuj Sharma
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2005 Aug 04
1
some thoughts on outlier detection, need help!
Dear listers:
I have an idea to do the outlier detection and I need to use R to
implement it first. Here I hope I can get some input from all the
guru's here.
I select distance-based approach---
step 1:
calculate the distance of any two rows for a dataframe. considering
the scaling among different variables, I choose mahalanobis, using
variance as scaler.
step 2:
Let k be the number of
2007 Mar 28
0
Outlier detection with the dprep library
Hi.
The dprep library has at least three different methods for outlier
detection: baysout, mahaout, robout.
I wanted to test them on a very simple data set:
vrmat<-cbind((1:22),c(8,14,14,17,21,20,27,23,25,33,31,32,30,36,37,40,42,44,52,61,81,265))
As you can see by eyeballing this, the last point is a very good outlier
candidate, and maybe the second to last point, too. Anyway, I
2011 Apr 09
1
Robust Statistics for Outlier Detection
Hi Dear All,
Can someone give me a suggestion about which robust statistics are most
appropriate for outlier detection in linear models, and is available with R
?
Thanks for any idea.
--
View this message in context: http://r.789695.n4.nabble.com/Robust-Statistics-for-Outlier-Detection-tp3438493p3438493.html
Sent from the R help mailing list archive at Nabble.com.
2009 Feb 24
0
About virtualization, kvm and xen
Hello,
I have understand that :
----------------------------
guest
----------------------------
driver_device0_guest
----------------------------
hypervisor
----------------------------
driver_device0_hypervisor
----------------------------
device0
----------------------------
in order to access to a device, a guest use driver_device0_guest
The
2009 Feb 24
0
About virtualization, kvm and xen
Hello,
I have understand that :
----------------------------
guest
----------------------------
driver_device0_guest
----------------------------
hypervisor
----------------------------
driver_device0_hypervisor
----------------------------
device0
----------------------------
in order to access to a device, a guest use driver_device0_guest
The
2009 May 09
1
Samba machine's account migration
Hello,
I moved my samba to another server, but my windows computer can't login.
I tested this: put win computer out of domain, and re-add it. But i loose my personal application changes.
How can i allow windows computers to login to my samba domain ?
Should i create machines' account with the same linux ID ?
Really thanks for help,
Regards.
M?l.
2010 Jul 26
1
Outlier detection in bimodal distribution
Hi,
I was looking for a package that would help with outlier detection for bimodal
distributions. I have tried 'outliers' and 'extremevalues' packages, but am not
sure if they are ok for bimodal distribution.
Any help would be highly appreciated!
thanks,
[[alternative HTML version deleted]]
2009 Feb 14
6
Outlier Detection for timeseries
Hello R users,
Can someone tell if there is a package in R that can do outlier detection
that give outputs simiilar to what I got from SAS below.
Many thanks in advance for any help!
Outlier Details
Approx
Chi-
2009 Feb 28
1
Device Drivers in xen, looking also for a white book about how xen works exactly
Hello,
I'm reading an excellent documentation about virtualisation in embedded system.
(available on open kernel labs site)
I have read these things : (It talks about managing drivers in a virtualization system)
"A straight virtualization approach can accomodate this by running the device the device driver inside the VMM. This requires porting all drivers to the hypervisor
2009 Feb 28
1
Device Drivers in xen, looking also for a white book about how xen works exactly
Hello,
I'm reading an excellent documentation about virtualisation in embedded system.
(available on open kernel labs site)
I have read these things : (It talks about managing drivers in a virtualization system)
"A straight virtualization approach can accomodate this by running the device the device driver inside the VMM. This requires porting all drivers to the hypervisor