Data from Westlund & Kurland (1953) on the diagnosis of multiple sclerosis (MS): two samples of patients, one from Winnipeg and one from New Orleans, were each rated by two neurologists (one from each city) in four diagnostic categories.
A 3-dimensional array resulting from cross-tabulating 218 observations on 3 variables. The variables and their levels are as follows:
|1||New Orleans Neurologist||Certain, Probable, Possible, Doubtful|
|2||Winnipeg Neurologist||Certain, Probable, Possible, Doubtful|
|3||Patients||Winnipeg, New Orleans|
M. Friendly (2000), Visualizing Categorical Data: http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/msdiag.sas
K. B. Westlund & L. T. Kurland (1953), Studies on multiple sclerosis in Winnipeg, Manitoba and New Orleans, Louisiana, American Journal of Hygiene, 57, 380–396.
M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.
data("MSPatients") ## Not run: ## best visualized using a resized device, e.g. using: ## get(getOption("device"))(width = 12) pushViewport(viewport(layout = grid.layout(ncol = 2))) pushViewport(viewport(layout.pos.col = 1)) popViewport() pushViewport(viewport(layout.pos.col = 2)) popViewport(2) dev.off() ## End(Not run) ## alternative, more convenient way mplot( agreementplot(t(MSPatients[,,1]), return_grob = TRUE, main = "Winnipeg Patients"), agreementplot(t(MSPatients[,,2]), return_grob = TRUE, main = "New Orleans Patients") ) ## alternatively, use cotabplot: cotabplot(MSPatients, panel = cotab_agreementplot)
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