Mammogram Ratings
Kundel & Polansky (2003) give (possibly contrived) data on a set of 110 mammograms rated by two readers.
data(Mammograms)
A frequency table in matrix form. The format is: num [1:4, 1:4] 34 6 2 0 10 8 5 1 2 8 ... - attr(*, "dimnames")=List of 2 ..$ Reader2: chr [1:4] "Absent" "Minimal" "Moderate" "Severe" ..$ Reader1: chr [1:4] "Absent" "Minimal" "Moderate" "Severe"
Kundel, H. L. & Polansky, M. (2003), "Measurement of Observer Agreement", Radiology, 228, 303-308, Table A1
data(Mammograms) B <- agreementplot(Mammograms, main="Mammogram ratings") # agreement measures B Kappa(Mammograms) ## other displays mosaic(Mammograms, shade=TRUE) sieve(Mammograms, pop = FALSE, shade = TRUE) labeling_cells(text = Mammograms, gp_text = gpar(fontface = 2, cex=1.75))(as.table(Mammograms))
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