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Dear Sir, I am comparing two samples using wilcox.test in R. Literature appears to describe mann whitney u test as the most appropriate test to use on my data. is the wilcox.test function equivalent to mann-whitney u? Is there a way to gain the U-value as apposed to the W-value in R? Thank you

Hi, I do want to use the Mann-Whitney test which ranks my data and then uses those ranks rather than the actual data. Here is the R code i am using: group1<- c(1.34,1.47,1.48,1.49,1.62,1.67,1.7,1.7,1.7,1.73,1.81,1.84,1.9,1.96,2, 2,2.19,2.29,2.29,2.41,2.41,2.46,2.5,2.6,2.8,2.8,3.07,3.3) > group2<- c(0.98...

Hi, I know that I can perform a Mann-Whitney U test with wilcox.test(x,y) But instead of an U-value I get a W-Value. Is it possible to change this?

Hi, I have a statistical question. To apply the Mann Whitney test to compare a pair of vectors, they must to have the same length ? Thanks, Rodrigo [[alternative HTML version deleted]]

Hi all, The Kruskal-Wallis test is a generalization of the two-sample Mann-Whitney test to *k* samples. That being the case, the Kruskal-Wallis test with *k*=2 should give an identical p-value to the Mann-Whitney test, should it not? x1<-c(1:5) x2<-c(6,8,9,11) a<-wilcox.test(x1,x2,paired=FALSE) b<-kruskal.test(list(x1,x2),paired=FALSE) a$p.value [1] 0.01587302 b$p.v...

Hi, Could someone please tell me how to perform a Mann-Whitney U test on a dataset with 2 groups where one group has more data values than another? I have split up my 2 groups into 2 columns in my .txt file i'm using with R. Here is the code i have so far... group1 <- c(LeafArea2) group2 <- c(LeafArea1) wilcox.test(group1, group2) This code work...

...nks assigned to the group b W2 <- sum.rank.b - (length(b)*(length(b)+1)) / 2 W2 U2 <- length(a)*length(b)/2-W2 U2 #end code And given the fact that: - in the note of R Wilcox.test is clearly stated: ? The literature is not unanimous about the definitions of the Wilcoxon rank sum and Mann-Whitney tests. The two most common definitions correspond to the sum of the ranks of the first sample with the minimum value subtracted or not. R subtracts [?.], giving a value which is larger by m(m+1)/2 for a first sample of size m? - as result of the same test performed with different stat packages (i....

Does anyone have a piece of code or know how I can use R to generate a table of critical values for the Mann-Whitney (aka Wilcoxon Rank Sum) test. Ideally, I'd like a table that contains the critical values for any two samples of size 3 through 30. I could use Monte Carlo simulation or the normal approximation when n1 and n2 are greater than, 10, but I figured someone may know how to calculate these exactly...

...;Does anybody know what is relation between 'T' value calculated by 'wilcox_test' function (coin package) and more common 'W' value?" I found the question interesting and ran the commands in R and SPSS. The W reported by R did not seem to correspond to either Mann-Whitney U, Wilcoxon W or the Z which I have more commonly used. Correction for ties may have affected my results. Can anyone else explain what the reported W is and the relation to the reported T? regards bob

Hello, I'm having some issues grouping cases for some Mann-Whitney U tests I'm attempting to run. I'm willing to use wilcox.test if it'll work; I've also tried wilcox_test() from the "coin" package. Here's the deal: for each column (A through H), I would like to run the two-sample independent test, comparing Group 5 (CD8.14 through CD...

Dear r-helpers, I want to test groups of samples for significant differences. Question: Does Group1 differ significantly from group2. This is a question to be answered by mann-whitney-u-test. I know that I can use wilcox.test with 2 samples. My problem: How can r perform the test automatically if there are more than 2 groups in my data frame. Test group1 vs. 2, 1 vs. 3, 1 vs. 4, etc. This is my skript: Deckung <- read.table("Gesamtdeckung.csv", sep=";"...

Hello, I am hoping someone could shed some light into the Wilcoxon Rank Sum Test for me? In looking through Stats references, the Mann-Whitney U-test and the Wilcoxon Rank Sum Test are statistically equivalent. When using the following dataset: m <- c(2.0863,2.1340,2.1008,1.9565,2.0413,NA,NA) f <- c(1.8938,1.9709,1.8613,2.0836,1.9485,2.0630,1.9143) and the wilcox.test command as below: wilcox.test(m,f, paired = FALSE, alternat...

Hello, I am super excited about my proposal being accepted. I would like to thank Whitney for her help during the application phase. I did schedule some tasks for community bonding period. I have started looking into analysis pass for code motion checks. I will keep you updated with the progress. Best, Rithik Sharma -------------- next part -------------- An HTML attachment was scrubbe...

...a Loop. > > Ettore Tiotto > IBM Canada Laboratory, 8200 Warden Ave, Markham, ON L6G 1C7, Canada > etiotto at ca.ibm.com -- Phone: (905) 413-2387 > > “No great discovery was ever made without a bold guess.” - Isaac Newton > > > > ----- Original message ----- > From: Whitney T Tsang/Toronto/IBM > To: Ta-Wei Tu <tu.da.wei at gmail.com> > Cc: llvm-dev <llvm-dev at lists.llvm.org>, Whitney Tsang < > whitney.uwaterloo at gmail.com>, Ettore Tiotto/Toronto/IBM at IBMCA > Subject: Re: [EXTERNAL] Re: [llvm-dev] Regarding the project "Create &...

Hello, can someone please help me with coding a function for a bootstrap WMW test (package boot, R under Windows, version 1.6.2)?

Dear Stefan I need to apply a Mann Whitney test to my data, by applying a bootstrap, in R. Loonkig for an answer in internet I found your question to the R mailing list but I have not found the answer to your question. Please, could you help me? thank you very much in advance. Best regards Luciana

...? Also, is it possible to add passes designed for LegacyPassManager into the NewPassManager and vice versa? What do you think about the plan? I'm quite likely to miss something important, so please kindly correct me if I'm in the wrong direction. Thank you very much! Sincerely, Ta-Wei Tu Whitney Tsang <whitney.uwaterloo at gmail.com> 於 2020年7月15日 週三 下午6:14寫道： > Hi Wayne, > > As far as I know, no one is working on this project. Your contribution is > always appreciated. > > This project aims to create LoopNestPass in the new pass manager (NPM). > In https://www.y...

...c(1:100), size = 20, replace = TRUE) y <- sample(x = c(1:100), size = 20, replace = TRUE) weight <- runif(n = 20) data <- data.frame(x = x, y = y, weight = weight) I?m new with statistical tests. I?ve read this other post about a similar issue: http://r.789695.n4.nabble.com/Weighted-Mann-Whitney-Wilcoxon-Test-td4695699.html <http://r.789695.n4.nabble.com/Weighted-Mann-Whitney-Wilcoxon-Test-td4695699.html> But I?m not sure if I can use the packages/works cited there. Any help/comment would be fantastic for me. Thank you! [[alternative HTML version deleted]]

...nt times due to their allocation on particular physical machines. Is there a quick and simple way to get gluster to reset its configuration back to nothing? I am very new to gluster so I apologize for any confusion of terminology here, I hope it is clear what I am asking. Thanks in advance, Joe Whitney

...date different users e. change existing loop transformations to use the improved CodeMoverUtils (should do with (d) at the same time). Note: finding transformations that use code motion is part of the project, so no need to include every opportunity in the proposal. Hope this help. Regards, Whitney Tsang From: RITHIK SHARMA <rithiksh02 at gmail.com> To: whitneyt at ca.ibm.com Cc: etiotto at gmail.com, Stefanos Baziotis <stefanos.baziotis at gmail.com>, llvm-dev <llvm-dev at lists.llvm.org>, bmahjour at ca.ibm.com Date: 2020/03/27 03:08 PM Subject:...