MSPatients {vcd} | R Documentation |
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.
data(MSPatients)
A 3-dimensional array resulting from cross-tabulating 218 observations on 3 variables. The variables and their levels are as follows:
No | Name | Levels |
1 | New Orleans Neurologist | Certain, Probable, Possible, Doubtful |
2 | Winnipeg Neurologist | Certain, Probable, Possible, Doubtful |
3 | Patients | Winnipeg, New Orleans |
Michael Friendly (2000), Visualizing Categorical Data: http://hotspur.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, Lousiana, American Journal of Hygiene, 57, 380-396.
M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.
data(MSPatients) par(mfrow = c(1,2)) agreementplot(t(MSPatients[,,1]), main = "Winnipeg Patients") agreementplot(t(MSPatients[,,2]), main = "New Orleans Patients") par(mfrow = c(1,1))