similar to: Jonckheere-Terpstra test using coin package?

Dear fellow R users, Keywords: Kruskal-Wallis, Post-Hoc, pair-wise comparisons, Nemenyi-Damico-Wolfe-Dunn test, coin package, oneway_test I am using the "oneway_test" function in the R package "coin" and I am obtaining results which I cannot believe are accurate. I do not wish to waste anyone's time and so if the following problem is rather trivial, I apologize, however I

Hello, can anybody here explain what a Jonckheere-Terpstra test is and whether it is implemented in R? I just know it's a non-parametric test, otherwise I've no clue about it ;-( . Are there alternatives to this test? thanks for help, Arne

Hi list, I tried to load the package SAGx and failed because it complains it's looking for the Biobass which is not there. Then I looked up the package list and Biobass is not found. I'm trying to run the Jonckheere-Terpstra test and from what I see in the R archive, SAGx is the only place it's been implemented. > library(SAGx) Loading required package: multtest Loading required

Dear Researchers, Sorry for this email but I am not a statistician, and for this I have this problem to understand. Thanks in Advance for help and suggestions. Gianni I have 21 classes (00, 01, 02, 04, ....,020) with different length. I did a kruskal wall test in R with the following code kruskal.test(m.class.l, m.class.length.lf) Kruskal-Wallis rank sum test data: m.class.l and

I discovered that the Kendall's tau calculation in R uses all pairwise comparisons which is O(n^2) and takes a long time for large vectors. I implemented a O(n*log(n)) algorithm based on merge-sort. Is this of interest to be included in core R? The code (fortran and R wrapper) is available in my package clinfun v0.9.7 (not exported in NAMESPACE). Thanks, Venkat -- Venkatraman E. Seshan,

It seems that MASS suggest to judge on the basis of sum(residuals(mode,type="pearson"))/df.residual(mode). My question: Is there any rule of thumb of the cutpoiont value? The paper "On the Use of Corrections for Overdispersion" suggests overdispersion exists if the deviance is at least twice the number of degrees of freedom. Are there any further hints? Thanks. -- Ronggui

Dear R users, I am trying to apply the analysis processed in a paper, on the data I'm working with. The data is: 80 patients for which I have survival data (time - days, and event - binary), and microarray expression data for 200 genes (predictor continuous variables). My data matrix "data.test" has ncol: 202 and nrow: 80. What I want to do is: - run recursive partitioning on

Dear all, I've discovered the possibility to do the Nemenyi-Damico-Wolfe-Dunn test in the library(coin); oneway_test() With the given example I am unfortunately not able to reproduce the test. What does trafo and contrMat mean? I have a dataframe with 176 elements in 7 classes. It may be a problem, that my model isn't balanced? In Class1 I happen to have 4 elements, while there are 90 in

Anyone know if coin can run a permutation test based on a (user-defined) statistic other than the mean difference? The function independence_test does the permutation t-test via difference in means. I'm wondering if it's possible to use independence_test to run a permutation test for some other statistic than the difference in means. For example, I'd like to run a permutation test

Hello again, First, thanks for the help that got the latest plotrix package finished. I had been planning to write something about packages since Scott Waichler offered the gantt.chart function. Then Ben Bolker (who helped me to write the axis.break function) asked if I would be willing to include some of his plotting functions and almost immediately after that Sander Oom kindly donated the

Hello again, First, thanks for the help that got the latest plotrix package finished. I had been planning to write something about packages since Scott Waichler offered the gantt.chart function. Then Ben Bolker (who helped me to write the axis.break function) asked if I would be willing to include some of his plotting functions and almost immediately after that Sander Oom kindly donated the

Dear R helpers, I am trying to understand how to use the independence_test function in the coin package. I think I suffer from a misunderstanding about what the package does. Either that or I do not understand how to use it properly. Specifically, I cannot understand if I can test independence of arbitrary statistics. Take the following example: set.seed(10) d <- data.frame(y = c(rnorm(10,

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")

Dear List, I'm interested in performing a permutation test on the interaction between a binary treatment indicator and a covariate (either continuous or categorical). I'm interested in the p-value of the interaction effect from a permutation test, and I'm using the coin package for that purpose. As I haven't seen any examples like this in the package documentation (or anywhere

Dear R users: I have been trying to figure out how to include string variables in a for loop to run multiple random forests with little success. The current code returns the following error: Error in trafo(data = data, numeric_trafo = numeric_trafo, factor_trafo = factor_trafo, : data class character is not supported In addition: Warning message: In storage.mode(RET@predict_trafo) <-

Michael, Got any solutions to this. We are confronted with the same problem only SUSE 9.x ,Samba , W200 workstations. Only few of them have this problem. (exactly as how you describe it). Mark

Hi, I'd like to apologise to those who did not attend events in Boston at which I spoke, or was present for book signings, for not doing more to create greater awareness and for poor publicity on my part. (It was never my intent to act in secret.) :) In response to requests: 1) In future I will notify this list of events I will be present at. (That may encourage other Samba-Team members to

Hello Samba List- Apologies for the late notice on this. We have seats available for John H. Terpstra's Samba workshops on Thursday and Friday this week in Seattle, WA. He is conducting Samba 101 and Advanced Samba Thursday and Windows NT4/200X Migration to Samba-3 on Friday. Attendees receive a copy of "Samba-3 By Example" as part of the workshop(s). You can view class

John, It's great to see you on this list. I'm a Samba newbie and recently found your book, "Samba-3 by Example". I must say this is the best written "how-to" type of book on any subject I have ever seen. The various examples fit a number of categories and answered so many questions for me. I just wish similar books were available on other applications. I just

Freedom Technology Center is proud to announce a series of events happening in Dallas, TX. from June 16th - 19th in conjunction with the Seattle ITEC (www.goitec.com) show. >From 7:00-8:30 on June 16th, John H. Terpstra is having a special meet-the-author cocktail reception to promote his latest book "Samba-3 By Example". The event is sponsored by his publisher Prentice Hall and