Re: [R] Mann-Whitney U

2007-08-15 Thread Marc Schwartz
On Wed, 2007-08-15 at 12:06 -0600, Natalie O'Toole wrote: > 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(1.34,1.47,1.48,1.49,1.62,1.67,1.7,1.7,1.7,1.73,1.81,1.8

Re: [R] Mann-Whitney U

2007-08-15 Thread Peter Dalgaard
onparametrics: Statistical methods based on ranks. > 1975. Holden-Day. San Francisco, CA. > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Natalie O'Toole > Sent: Wednes

Re: [R] Mann-Whitney U

2007-08-15 Thread Lucke, Joseph F
etrics text. I used Lehmann, E. L., Nonparametrics: Statistical methods based on ranks. 1975. Holden-Day. San Francisco, CA. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Natalie O'Toole Sent: Wednesday, August 15, 2007 1:07 PM To: r-help@stat.math

[R] Mann-Whitney U test discrepancies

2007-08-15 Thread Natalie O'Toole
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.

Re: [R] Mann-Whitney U

2007-08-15 Thread Natalie O'Toole
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) > group

Re: [R] Mann-Whitney U

2007-08-14 Thread J Dougherty
Natalie, It's best to provide at least a sample of your data. Your field names suggest that your data might be collected in units of mm^2 or some similar measurement of area. Why do you want to use Mann-Whitney, which will rank your data and then use those ranks rather than your actual data?

Re: [R] Mann-Whitney U

2007-08-14 Thread Peter Dalgaard
Prof Brian Ripley wrote: > On Tue, 14 Aug 2007, Natalie O'Toole wrote: > > >> 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 f

Re: [R] Mann-Whitney U

2007-08-14 Thread Prof Brian Ripley
On Tue, 14 Aug 2007, Natalie O'Toole wrote: > 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 cod

Re: [R] Mann-Whitney U

2007-08-14 Thread Marc Schwartz
On Tue, 2007-08-14 at 14:45 -0600, Natalie O'Toole wrote: > 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

[R] Mann-Whitney U

2007-08-14 Thread Natalie O'Toole
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(

RE: [R] Mann-Whitney U Table

2003-08-26 Thread Liaw, Andy
See ?qwilcox. Andy > -Original Message- > From: Mark Lamias [mailto:[EMAIL PROTECTED] > Sent: Tuesday, August 26, 2003 2:56 PM > To: '[EMAIL PROTECTED]' > Cc: Mark Lamias > Subject: [R] Mann-Whitney U Table > > > Does anyone have a piece of code o

[R] Mann-Whitney U Table

2003-08-26 Thread Mark Lamias
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

RE: [R] mann-whitney u test

2003-01-23 Thread Adaikalavan Ramasamy
Look under wilcox.test() with the option paired=FALSE -Original Message- From: Jan Malte Wiener [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 23, 2003 8:40 PM To: R Subject: [R] mann-whitney u test hi, i can not find the mann whitney u test in R. could someone help me with that

RE: [R] mann-whitney u test

2003-01-23 Thread Marc Schwartz
Jan Take a look at ?wilcox.test Regards, Marc > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Jan Malte Wiener > Sent: Thursday, January 23, 2003 6:40 AM > To: R > Subject: [R] mann-whitney u test > > > hi, > i

Re: [R] mann-whitney u test

2003-01-23 Thread Jonathan Baron
On 01/23/03 13:39, Jan Malte Wiener wrote: >hi, >i can not find the mann whitney u test in R. >could someone help me with that ? See wilcox.test in the ctest package (which loads automatically, so just say ?wilcox.test) -- Jonathan Baron, Professor of Psychology, University of Pennsylvania Home p

[R] mann-whitney u test

2003-01-23 Thread Jan Malte Wiener
hi, i can not find the mann whitney u test in R. could someone help me with that ? thanks, jan -- Jan Malte Wiener Max-Planck-Institute for Biological Cybernetics Spemannstr. 38, 72076 Tuebingen, Germany Tel.: +49 7071 601 631 Email: [EMAIL PROTECTED] ___