search for: potthoff

I am using rw0641. In my continuing quest to understand repeated measures analysis, I again return to lme. I exported the Potthoff and Roy data Orthodont.dat from S-PLUS 4.5 to avoid capture errors and ran the examples in the R help. I imported the data.frame with data <- read.table("Orthodont.dat",header=T) attach(data) and created the objects Orthodont.fit1 <- lme(fixed=distance~age,random=~age) Orthod...

Dear R users, I am glad to announce the release of a new package for R: DCluster. It implements a number of methods for the detection of clusters of disease. It includes methods to test Poisson extra-variation (Chi-square test and Potthoff-Whittinghill's test), Spatial Autocorrelation (Moran's I and Geary's c), general clustering (Whittermore's statistic and Tango's statistic), scan methods (Openshaw's GAM, Besag & Newell's methods and Kulldorff & Nagarwalla's statistic) and a focused test (Sto...

Dear R users, I am glad to announce the release of a new package for R: DCluster. It implements a number of methods for the detection of clusters of disease. It includes methods to test Poisson extra-variation (Chi-square test and Potthoff-Whittinghill's test), Spatial Autocorrelation (Moran's I and Geary's c), general clustering (Whittermore's statistic and Tango's statistic), scan methods (Openshaw's GAM, Besag & Newell's methods and Kulldorff & Nagarwalla's statistic) and a focused test (Sto...

Hello R-List I use DClusters package (I work in a cancer regestry). I have 2 questions about it: 1-how is it possible to get back the bootstrap pValue? I mean the pValue of the calculated statistic with respect of the distribution of this statistic under the null hypothesis. 2-how is it possible to test an overdispersion in the poisson model? for choosing a best model I need this mesure of