Displaying 20 results from an estimated 4000 matches similar to: "dixon test"
2012 Nov 16
0
dixon test
I would like to extend Dixon's values beyond 30. I've read over Rorabacher
article but didn't understand the equations well enough to convert them to
Excel and then "drag" the cells out extending the n.
Rorabacher,_1991.pdf
<http://r.789695.n4.nabble.com/file/n4649819/Rorabacher%2C_1991.pdf>
Dean_&_Dixon,_1951.pdf
2004 Jun 30
1
outlier tests
I have been learning about some outlier tests -- Dixon
and Grubb, specifically -- for small data sets. When
I try help.start() and search for outlier tests, the
only response I manage to find is the Bonferroni test
avaiable from the CAR package... are there any other
packages the offer outlier tests? Are the Dixon and
Grubb tests "good" for small samples or are others
more
2012 Sep 13
0
problematic p values for Dixon Q test
I am using R dixon.test in order to perform Q test for detection of outliers.
The p-values for high Q values are consistent with the table in Rorabacher,
D.B. (1991) http://www.flworkshop.com/sscs/dixon_test.pdf, but it seems that
small Q-values get problematic p-values. For example:
dixon.test(c(0.324,0.5,1,1.324),two.sided=T)
Q = 0.324, p-value = 1
2008 Sep 03
2
R update
Hi all,
please, someone can explain me how update my R version?
thank you!
giov
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2008 Sep 09
1
help on wavelet
Hi,
I have little experience using wavelet and I would like to know if it is
possible,using R wavelet package, to have a plot of frequency versus time.
thank you
giov
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2008 Sep 04
1
help on jarque test
Hi all,
I used the function jarque.test (in the moments package) on my data set and
I obtained something like this:
Jarque-Bera Normality Test
data: x
JB = 4.8381, p-value = 0.089
alternative hypothesis: greater
or
Jarque-Bera Normality Test
data: x
JB = 2.6018, p-value = 0.2723
alternative hypothesis: greater
I cannot understand this. Please, someone can help me?
thank you
2007 Apr 25
1
How to identify and exclude the outliers with R?
Hello, everyone,
I want to ask a simple question.
If I have a set of data,and I want to identify how many outliers there are
in the data.Which packages and functions can I use?
Thanks.
Shao chunxuan.
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2007 Jun 19
5
outlying
hello,
are there functions to detecte outlying observations in samples?
thanks.
___________________________________________________________________________
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2009 Jan 21
1
Multifractal detrended fluctuation analysis
Dear R-users,
Has anyone written a function for multifractal detrended
fluctuation analysis? The "fractal" package does mono-fractal DFA,
but not multifractal as far as I can tell. The MF-DFA approach is
presented in:
J. W. Kantelhardt, S. Zschiegner, E. Koscielny-Bunde, S. Havlin, A.
Bunde, and H. E. Stanley, "Multifractal Detrended Fluctuation
Analysis of
2003 Jul 16
2
Stem and leaf display?
I would like to do some fairly basic stem-and-leaf displays in R.
I am aware (I might even say painfully aware) of stem(base) and
have tried it. That's why I'm hoping someone has a usable stem-
and-leaf display for R so that I don't have to write my own.
r-project.org > Search > R Site Search > "stem and leaf display"
finds nothing.
I also tried the mail archive
2011 May 04
1
Outlier removal by Principal Component Analysis : error message
Hi,
I am currently analysis Raman spectroscopic data with the hyperSpec package.
I consulted the documentation on this package and I found an example
work-flow dedicated to Raman spectroscopy (see the address :
http://hyperspec.r-forge.r-project.org/chondro.pdf)
I am currently trying to remove outliers thanks to PCA just as they did in
the documentation, but I get a message error I can't
2000 Jul 11
1
q() problem and more.
Hi Rers,
W/o trying to make a long story short (I hope you read that correctly), I
have been working on a nice little R function ...
Somewhere along the line I got an error that refers to a max function in
my function (I think this is a vector vs. scalar issue):
Error in max(..., na.rm = na.rm) : invalid "mode" of argument
If that's not bad enough, even when I q() R and say
2010 Nov 30
3
Outlier statistics question
I have a statistical question.
The data sets I am working with are right-skewed so I have been
plotting the log transformations of my data. I am using a Grubbs Test
to detect outliers in the data, but I get different outcomes depending
on whether I run the test on the original data or the log(data). Here
is one of the problematic sets:
fgf2p50=c(1.563,2.161,2.529,2.726,2.442,5.047)
2010 Jan 19
5
How to detect and exclude outliers in R?
Suppose I am reading data from a file and the data contains some outliers. I
want to know if it is possible in R to automatically detect outliers in a
dataset and remove them
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2011 Oct 20
2
How to remove multiple outliers
Hi All,
I am working on the dataset in which some of the variables have more than
one observations with outliers .
I am using below mentioned sample script
library(outliers)
x1 <- c(10, 10, 11, 12, 13, 14, 14, 10, 11, 13, 12, 13, 10, 19, 18, 17,
10099, 10099, 10098)
outlier_tf1 = outlier(x1,logical=TRUE)
find_outlier1 = which(outlier_tf1==TRUE, arr.ind=TRUE)
beh_input_ro1 =
2006 May 02
4
Migrate from RHAS 4 to CentOS 4.2
I have a SGI Altix 350 (ia64) that came with RHAS 4, but without any
paid support. I would like to migrate the server over to CentOS.
Here is what I've pieced together from some older posts by Johnny,
can someone confirm this should work? I know this is somewhat
covered in the FAQ, although both entries refer to FC or WBEL, which
already have built-in yum support.
Install the
2004 Sep 23
6
detection of outliers
Hi,
this is both a statistical and a R question...
what would the best way / test to detect an outlier value among a series of 10 to 30 values ? for instance if we have the following dataset: 10,11,12,15,20,22,25,30,500 I d like to have a way to identify the last data as an outlier (only one direction). One way would be to calculate abs(mean - median) and if elevated (to what extent ?) delete the
2011 Feb 03
1
"hubers" function in R MASS library : problem and solution
Hello:
I found the "hubers" function in MASS library is NOT working on the following
data:
> a <-
2006 Nov 17
3
TLS timeout with Thunderbird
I'm trying to get dovecot working with various clients on my new
mailserver. I installed the base rc2 that comes with OpenBSD 4.0,
then upgraded to rc14 when I ran into problems with TLS and
Thunderbird. The server has no problems with Mail.app on my laptop,
but any connection attempts from Thunderbird timeout after the TCP
handshake.
13:53:41.074438 66.x.x.2.50483 >
2011 Dec 30
3
good method of removing outliers?
Happy holidays all!
I know it's very subjective to determine whether some data is outlier or
not...
But are there reasonally good and realistic methods of identifying outliers
in R?
Thanks a lot!
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