Displaying 20 results from an estimated 600 matches similar to: "Kendall's tau code"
2010 Apr 22
2
Jonckheere-Terpstra test using coin package?
Is it possible to implement the Jonckheere-Terpstra test for ordered
alternatives using the coin package: Conditional Inference Procedures
in a Permutation Test Framework?
I found jonckheere.test{clinfun}, but it uses a normal approximation
when ties are present in the data. To make this concrete, I've
include
a small dataset. Thanks. --Dale
Hollander and Wolfe, 1999 Table 6.6, pg 205
2006 Sep 12
1
Kendall's tau-c
Hello,
I can't find a package which calculates Kendall's tau-c. There is the
package Kendall, but it only calcuates Kendall's tau-b.
Here is the example from
ttp://www2.chass.ncsu.edu/garson/pa765/assocordinal.htm.
cityriots <- data.frame(citysize=c(1,1,2,2,3,3),
riotsize=c(1,2,1,2,1,2), weight=c(4,2,2,3,0,4))
cityriots <- data.frame(lapply(cityriots,function(x)
2008 Apr 22
1
Comparing kendall's tau values?
I have 3 variables relating to the successful introductions of species
to 95 different areas: introduction frequency; number of successes pre
1906; number of successes post 1906
The data are not normal, nor homo-skedatic, so I am using non-parametric
statistics.
I have calculated Kendall's tau between both introduction & successes
pre 1906 (tau=0.3903) and introduction & successes
2003 Apr 07
1
kendall's tau-b computation (PR#2742)
Full_Name: Dan Field
Version: 1.6.2
OS: N/A
Submission from: (NULL) (209.115.168.187)
In kendall.c (library is ctest), the limits for the first loop in routine
kendall_tau run from 0 through n-1, and the inner loop runs from 0 through i-1.
This causes the each pair at index i to be compared with itself; my
understanding is that there should only be n*(n-1)/2 pairs under consideration
for
2005 Jun 28
1
faster algorithm for Kendall's tau
Hi,
I need to calculate Kendall's tau for large data
vectors (length > 100'000).
Is somebody aware of a faster algorithm or package
function than "cor(, method="kendall")"?
There are ties in the data to be considered (Kendall's
tau-b).
Any suggestions?
Regards
Ferdinand
2023 Nov 07
1
Concordance and Kendall's tau in copula
Dear
I estimate a sample selection model using the Clayton copula and Burr
and Gaussian marginal. I need to derive ther Kendall'sw tau from the
concordance coefficient by integration. I came across a way to do that
in R long time ago but cannot find it again. Can somewone tell me what
to read and what to use? Thank you.
Steven Yen
2012 Jun 25
2
Fast Kendall's Tau
Hello.
Has any further action been taken regarding implementing David Simcha's fast Kendall tau code (now found in the package pcaPP as cor.fk) into R-base? It is literally hundreds of times faster, although I am uncertain as to whether he wrote code for testing the significance of the parameter. The last mention I have seen of this was in 2010
2010 Feb 08
2
Incorrect Kendall's tau for ordered variables (PR#14207)
Full_Name: Marek Ancukiewicz
Version: 2.10.1
OS: Linux
Submission from: (NULL) (74.0.49.2)
Both cor() and cor.test() incorrectly handle ordered variables with
method="kendall", cor() incorrectly handles ordered variables for
method="spearman" (method="person" always works correctly, while
method="spearman" works for cor.test, but not for cor()).
In
2002 Apr 25
3
Kendall's tau
A search of the archives did not reveal an answer:
For basic tests of association, where one has no a priori knowledge of the
form of the relation or of the distributions of the variables, rank
correlation seems like a good start. Why is cor.test() with Kendall and
Spearman options relegated to the ctest package, rather than in the base
package? Does this suggest that the developers consider
2006 Feb 12
2
Updates
SuSE tries to feed me Wine V20050211 as a security fix for the recent WMF
vulnerability. OTOH, WneHQ says that this is fixed in V0.9.6.
Can anyone tell me how to specify to "YOU" (YaST Online Updater) that I most
certainly don't want that 20050211 version? Not now -- not ever! I am now using
V0.9.7. If I permit "YOU" to perform automatic updates I get clobbered by this
2007 Jun 13
1
cant decode speex file
the speexdec is incorrectly decoding a file Encoded with: Java Speex Command Line Encoder v0.9.7 ($Revision: 1.2 $)
I have to look at the java source code file to find out the details (sampling, mono, etc)
---------------------------------
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2009 Dec 13
2
O(N log N) Kendall Tau
I've noticed that the implementation of Kendall's Tau in R is O(N^2).
The following reference describes how it can be done in O(N log N):
A Computer Method for Calculating Kendall's Tau with Ungrouped Data
William R. Knight
Journal of the American Statistical Association, Vol. 61, No. 314, Part
1 (Jun., 1966), pp. 436-439
http://www.jstor.org/pss/2282833
I'm interested in
2007 Jun 13
1
Re: Speex-dev Digest, Vol 37, Issue 19
I found the details: 44100hz, 16bits, stereo
I am looking at rewriting the program to record at
8Khz/16Khz/32Khz mono
only
should I record at 44100hz (and convert down) or
record at the required hz
level?
----- Original Message -----
From: <speex-dev-request@xiph.org>
To: <speex-dev@xiph.org>
Sent: Thursday, June 14, 2007 3:44 AM
Subject: Speex-dev Digest, Vol 37, Issue 19
>
2005 Aug 13
1
R/S-Plus/SAS yield different results for Kendall-tau and Spearman nonparametric regression
Colleagues,
I ran some nonparametric regressions in R (run in RedHat Linux), then
a colleague repeated the analyses in SAS. When we obtained different
results, I tested S-Plus (same Linux box). And, got yet different
results. I replicated the results with a small dataset:
DATA:
37.5
23
37.5
13
25
16
25
12
100
15
12.5
19
50
20
100
13
100
10
100
10
100
16
50
10
87.5
2020 Nov 15
10
[Bug 1483] New: v0.9.7 does not compile for arm-linux-gnueabihf
https://bugzilla.netfilter.org/show_bug.cgi?id=1483
Bug ID: 1483
Summary: v0.9.7 does not compile for arm-linux-gnueabihf
Product: nftables
Version: unspecified
Hardware: arm
OS: Debian GNU/Linux
Status: NEW
Severity: blocker
Priority: P5
Component: nft
Assignee: pablo at
2005 Aug 18
2
kendall tau correlation test for ties: Potential error (PR#8076)
Full_Name: Dirk Koschuetzki
Version: 2.1.1
OS: source code
Submission from: (NULL) (194.94.136.34)
Hello,
>From the source code (R-2.1.1, file: .../R-2.1.1/src/library/stats/R/)
******************************
cor.test.default <-
function(x, y, alternative = c("two.sided", "less", "greater"),
method = c("pearson", "kendall",
2006 Sep 13
2
kendall's w
Hi,
I try to calculate Kendall's W coefficient and I have a bizarre error.
little.app.mat<-matrix(c(1,3,4,2,6,5,2,4,3,1,5,6,3,2,5,1,5,4),nrow=3,byrow=TRUE)
print(kendall.w(little.app.mat[-1,]))
>>> Kendall's W for ordinal data
>>> W = 0.7753623Error in if (is.na(x$p.table)) { : argument is of
length zero
2012 Aug 20
1
Kendall package tau-a, b, and c
Hi all,
I would like to ask a question related to Kendall package. I ran Kendall
(x,y) and
saw the results. But I am not sure which tau values R reported. I have
ties in
my data set, so I want tau-b. Can anybody tell how Kendall package is
calculating tau values? I have looked at the package PDF, but I could
not find
any useful information. As long as I see from the following
link, there
2008 May 05
0
kendall tau a,b,c
hi,
i have 2 lists of ranks for which i'd like to compute kendall tau.
there are ties in the ranks which (to the best of my knowledge) means i
cant use tau a but rather b or c.
how does R handle that? are ties automatically detected (using
corr.test()) and is tau b/c computed instead of tau a?
also kendall does not work when values in list 1 do not occur in list 2
(and vice versa) - how does
2011 Apr 27
2
ROCR for combination of markers
Dear list
I have 5 markers that can be used to detect an infection in combination. Could you please advise me how to use functions in ROCR/ other package to produce the ROC curve for a combination of markers?
I have used the following to get ROC statistics for each marker.
pred <- prediction(y$marker1, y$infectn)
perf <-performance(pred,"tpr","fpr")