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Dear friends, two years ago (as I found on the web) Paul sent the following message but I was not able to find if he got an answer. Today I have the same question and it would be great if I could find out that this test has been implemented (somehow) in R. Please do not confuse it with the Brown-Forsythe test of equality of variances. Thank you: I've been searching around for a function for computing the Brown-Forsythe F* statistic which is a substitute for the normal ANOVA F statistic for when there are unequal variances, and when there is evidence of non-normality. A couple of other people h...

...t do what you want? Hope this helps, Matt Wiener -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Sven Hartenstein Sent: Monday, June 21, 2004 3:23 PM To: r-help at stat.math.ethz.ch Subject: [R] Welch-JM-Test or Brown-Forsythe-Test in R? Hi, I want to test mean differences of > 2 groups with heterogenous variances and wonder whether Welch-JM-Test and/or Brown-Forsythe-Test are available in R. (These two are the ones I found in the literature and SPSS provides, I'm open for alternatives.) Any help apreciated!...

I've been searching around for a function for computing the Brown-Forsythe F* statistic which is a substitute for the normal ANOVA F statistic for when there are unequal variances, and when there is evidence of non-normality. A couple of other people have asked this question, the responses I found have been: ?oneway.test However, that function appears to use the We...

Hi, do anyone know which statistical software have the Brown-Forsythe Test for differences of numerical continue data groups wich variance heterogenity? not ofr evaluate the homogenity of variances, for evaluated the differences between groups as ANOVA. thanks Jos?? Herrera M??xico _________________________________________________________________ T1msn Search. T...

I would appreciate confirmation that the function vcov(model.nlme) gives the var-cov matrix of the fixed effects in an nlme model. Presumably the random-effects var-cov matrix is given by cov(ranef (model.nlme)? Rob Forsyth

In some trial simulation work I need to create batch files that will repeatedly generate pseudoreplicate datasets and then create non- linear mixed effects models using nlme. Inevitably these models sometimes fail to converge but I need the batch file to simply move on to another simulation rather than abort. I am using the try() function as in model<-try((nlme(...))) which handles

After loading the RODBC package version 1.1-7, Ctrl-C changes its behaviour and is quitting R and returning to the (unix-)command prompt on the solaris2.8 platform here. Here's what happened before and after loading RODBC > for (i in 1:10^5) rnorm(10) ^C > library(RODBC) > for (i in 1:10^5) rnorm(10) ^C bash-3.00$ platform sparc-sun-solaris2.8 arch

Dovecot Version 2.0.9 I am having an issue where all vacation messages are being sent to root. Is any one able to advise. Dovecot Log Shows :- Sieve: msgid=< CAMD5TViw0sSigGm8JY5WOv0ROs1UdCJFnvb9vo-RzcNN74E92Q at mail.xxxxxx.com>: sent vacation response to <root> The emails are handed off to dovecot from sendmail using procmail :0 w | $DELIVER The variable $DELIVER is set as

Hi, I'm just starting out on R. I have an example data frame listed below. I have regressed Y on X1. lm(Y~X1). Would like to obtain the Brown-Forsythe test on residuals. I am unsure of how to conduct the following steps. (1) Inputting the residuals from regression into the data frame. (2) Splitting the groups above (X11) and below mean of X1 (X12) in the data frame. (3) Calculating the sum squared deviations of each group residual about the group...

I have heterogeneous variance in a two-way mixed effects ANOVA, with more than 2 groups in each factor. Is there something like oneway.test or a Brown-Forsythe test that will let me test for differences in means? Thanks! -Keith

...field anyway, but once one has verified that the key matches, I doubt that there can be any bad info in the key field itself, surely? Please Cc: me on any replies, as I am not subscribed to the list. Thanks Rogan -- In God we Trust -- all others must submit an X.509 certificate. -- Charles Forsythe <forsythe at alum.mit.edu> -- Tel: +27(11)806-6216 Fax: +27(11)806-5202 Cell: +27(82)784-9498 -- NOTE: This e-mail message and its attachments is subject to the disclaimers as published at: http://www.deloitte.co.za/disc.htm#emaildisc

Hello all now that I have finally got CyrusSASL to authenticate.... next up is installing Samba I'm running FreeBSD 5.2.1 and have the options in the ports tree of 2.2.11 and 3.0.6 In my test server intall I used 2.2.8 with success, and it is still running at home on a P166.... as a PDC but here at work it must work for mostly Win98SE machines, plus a couple of Win2000 and XP laptops.

Dear list Getting very frustrated with this simple-looking problem > m1 <- lm(x~y, data=mydata) > outliers <- abs(stdres(m1))>2 > plot(x~y, data=mydata) I would like to plot a simple x,y scatter plot with labels giving custom information displayed for the outliers only, i.e. I would like to define a column mydata$labels for the mydata dataframe so that the command >

> From: Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk> > Date: 01 Sep 2000 09:54:59 +0200 > > Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes: Important omission: specification from Murray Jorgensen The test that I was thinking of basically does an anova on a modified response variable that is the absolute value of the difference between an observation

Using AIX 5.3 and gcc-4.2.1 for building R-2.7.1 with the following configure flags OBJECT_MODE=64 CC="gcc -maix64" CXX="g++ -maix64" F77="gfortran -maix64" FC="gfortran -maix64" CFLAGS="-g -O3" CXXFLAGS="-g -O3" FFLAGS="-g -O3" FCFLAGS="-g -O3" LDFLAGS="-L/$HOME/usr/local/lib/ppc64

Hi, i have samba 3.0.7 and set a logon.bat script in /home/samba/netlogon But when i log in my domaine (from a windows xp sp1 machine) "Domi" the script isn't run, no error message at log in Just going on the share "netlogon" i got the sand-hour and nothing more happens What's wrong ? Thanks for any help *here my smb.conf * [global] # Do something sensible when

...sumption on homogeneity of variances. Prof. Ripley advice LDA / QDA procedures, many books (and many proprietary programs) advice Hartley's F_max, Cochran's minimum/maximum variance ratio (only balanced experiments), K^2 Bartlett's test, Levene's test. Morton B. Brown and Alan B. Forsythe in a 1974 article wrote about "Robust test for the equality of variances" (editet by Journal of the American Statistical Association Vol. 69, pp.: 364-367) "...the common F-ratio and Bartlett??s test are very sensitive to the assumption that the underlying populations are from a Gaus...

Op 12/16/2016 om 2:53 PM schreef Shaun Forsyth: > Dovecot Version 2.0.9 > > I am having an issue where all vacation messages are being sent to root. Is > any one able to advise. > > Dovecot Log Shows :- > Sieve: msgid=< > CAMD5TViw0sSigGm8JY5WOv0ROs1UdCJFnvb9vo-RzcNN74E92Q at mail.xxxxxx.com>: sent > vacation response to <root> > > The emails are handed

...Skills required: - OS X or FreeBSD/Mach kernel development experience - Network systems programming - Filesystem development - Excellent communication and documentation skills If you are interested, please email me. The position is located in Sunnyvale, California. Darlene Forsythe, PHR Staffing Consultant Phone: 408-585-5115 Email: dforsythe@omneon.com Web Site: www.omneon.com <http://www.omneon.com/>

The Brown-Forsyth test for homogeneity of variance is included in the HH package, downloadable from CRAN. library(HH) x <- c(rnorm(1000), rnorm(1000, 0, 1.2)) tmp <- data.frame(x=x, group=rep(c("s1","s1.2"), c(1000,1000))) plot.hov(x ~ group, data=tmp) hov(x ~ group, data=tmp)