Example 1. Assume that we are interested in the study of three economic districts with the following three cluster criteria: revenue from farming, revenue from livestock husbandry, and revenue from industry. The observational values Xi, i=1,2,3; j=1,2,3, of the ith economic district with respect to the jth criterion is given in the following matrix A: Let us now perform a synthetic clustering based on high, medium, and low incomes.
A =
80 20 100
40 30 30
10 90 60