Data recording the proportions of the 4 serum proteins from blood samples of 30 patients, 14 with known disease A, 16 with known disease B, and 6 new cases.
data(SerumProtein)anumeric a protein type
bnumeric a protein type
cnumeric a protein type
dnumeric a protein type
Type1 deasease A, 2 disease B, 3 new cases
The data consist of 36 cases: 14 with known disease A, 16 with known disease B, and 6 new cases and 5 v variables: a, b, c, and d for 4 serum proteins and Type for the diseases: 1 for disease A, 2 for disease B, and 3 for new cases. All row serum proteins proportions sums to 1 except some rounding errors.
Aitchison, J. (1986) The Statistical Analysis of Compositional Data (Data 16) pp20.