similar to: mannwitney

The function 'wilcox.test' in R and S gives (almost) identical results (see below). 'qwilcox' however, does not: > qwilcox(p,5,5) p: 0.025 0.975 -------------------- R> 3 22 S> 18 37 I originally wanted to ask a questions, but then I found the answer. Given the confusion I run into, I wonder if this experience is worth reporting. The

hi again, i still cannot open the file in spss :( i type: library(foreign) read.spss("H:\\Desktop\\bd1\\experiencia1") and the error comes: Error in read.spss("H:\\Desktop\\bd1\\experiencia1") : unable to open file can you help me? margarida,portugal

hi, i can?t download a file in access. when i type: > library(foreign) > read.spss("H:\Desktop\bd1\experiencia1") comes the error: Error in read.spss("H:Desktop\bd1experiencia1") : unable to open file do you know what is the problem? can you help me? margarida,porto,portugal

Hi, I would like to read a spss file in R. When i type read.spss("...") Comes the error: couldn't find function "read.spss" What shall i do? Margarida [[alternative HTML version deleted]]

Hello, I??m trying to read data from a text file but i can??t When i print: > a<-read.table(file="C:/dados10.txt") The next error appears: Error in file(file, "r") : unable to open connection In addition: Warning message: cannot open file `C:/dados10.txt' Can you help me? Margarida PS:The operating sistem i??m using is Unix

Hi, I have a data base in oracle and need to link R using ODBC. When i use the command odbcConnect a dsn is needed. I would like to create a dsn.Do you know how can i do it? Thank you. Margarida,Portugal

Full_Name: Mark J. Lamias Version: 1.7.0 OS: Windows 2000 Pro Submission from: (NULL) (65.222.84.72) I am running the qwilcox procedure and it is producing incorrect results. For example, dwilcox(.025, 3, 5) should equal 6, but it is equal to 1. Similarly, dwilcox(.025, 3, 6) should equal 7, but it equals 2. The critical values are not set being returned with the correct values. I've

> > > Performance statistics are interesting. If we assume the two populations > have a total of `m` members, then this implementation runs slightly slower > for m < 20, and much slower for 50 < m < 100. However, this implementation > works significantly *faster* for m > 200. The breakpoint is precisely when > each population has a size of 50; `qwilcox(0.5,50,50)`

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

Hello, I am a beginner in R, and I wonder if anyone could help me with a partial least square regression in R. I have looked up the instructions and the manual from Bjorn Mevi and Ron Wehrens. However, I think I managed to write the script correctly, but I dont understand the output on the R environment, and also how to decide on the number of components to use (from the RMSEP), and also how to

Hi, I believe I have significantly improved [dpq]wilcox functions by implementing Harding's algorithm: Harding, E.F. (1984): An Efficient, Minimal-storage Procedure for Calculating the Mann-Whitney U, Generalized U and Similar Distributions, App. Statist., 33, 1-6 Results on my computer show (against R-2.9.1): > system.time( dwilcox( 800, 800, 80) ) user system elapsed 0.240

I?ve been looking at this for a couple hours--it ended up being trickier than I expected to implement well. I?ve attached a new patch here. This version scales significantly better than the existing method for both `pwilcox` and `dwilcox`. Examples are included below. I can?t think of any other ways to improve runtime at this point. That?s not to say there aren?t any, though?I?m hopeful

Hello, I need help with a partial least square regression in R. I have read both the vignette and the post on R bloggers but it is hard to figure out how to do it. Here is the script I wrote: library(pls) plsrcue<- plsr(cue~fb+cn+n+ph+fung+bact+resp, data = cue, ncomp=7, na.action = NULL, method = "kernelpls", scale=FALSE, validation = "LOO", model = TRUE, x = FALSE, y =

Hi. I'm going to introduce the R-package for a group of medical doctors later this week and is a little confused about there use of a test named "willcoxon-pratt" for testing if the clinical and biochemical markers has decreased significantly after the use of some drugs for a group of patients. Looking into the R-functions I would in R recommand using a matched-pairs Wilcoxon

Hi, I have another problem, can you help? When i type: > library(RODBC) > a<-odbcConnect("oracle") > sqlQuery(a,"select DISTINCT(DOENT_ID) from EPISGDHS where (VALFACT BETWEEN 100 AND 50)") Comes the error: [1] "S1000 904 [unixODBC][Easysoft][Oracle]ORA-00904: \"DOENT_ID\": invalid identifier at offset 16" [2] "[RODBC] ERROR: Could

Hi, I have a problem, can you help? When i type: > library(RODBC) > a<-odbcConnect("oracle") > sqlQuery(a,"(select VALFACT>500 from EPISGDHS) UNION (select VALFACT<1000 from EPISGDHS)") Comes the error: [1] "S1000 923 [unixODBC][Easysoft][Oracle]ORA-00923: FROM keyword not found where expected at offset 15" [2] "[RODBC] ERROR: Could not

Hi! I'm trying to compare maximum likelihood estimator with maximum spacing estimator (in Generalized extreme value distribution). My problem is the following: i know how to determinate maximum likelihood estimator on R, but i dont find a way to do the maximum spacing estimator...:-( Any help would be great:-) -- View this message in context:

The following single line of code shows what I am trying to do, and the problem I am having... barplot(c(101,102,103),ylim=c(100,103)) The 'xaxis' is missing, and the grey bars 'fall off' the plot area. This is generally ugly, and I would like to trim the bars (ideally they would have a ragged appearance to show that I am 'zooming in'). I can see why what I am trying to

Hi! I have problems with my cellphone. It does not seem to quote the strings to the login command. I can logon using ie SquirrelMail but if i try to login using AndroidMail it just says "autentication failed". If i try maualy i get similar results. Changing password for test to "password-" a login test password- a OK Logged in. Changing password for test to "password

Hi, is anybody out there who knows APL and would help me to translate 52 lines of APL code into propper R? best, Torsten