grouping_con.sas

/* These decisions variables govern whether we suppress 0 or 2+ cells within each grouping constraint */

var choose_zero {con_set} binary;

/* For each grouping constraint, we must have 0 cells suppressed if we're choosing to have 0 cells suppressed */

con zero_con {i in con_set}: (sum{j in dec_set} choices[j] * constraints[i, j]) - (1 - choose_zero[i]) * 100000000000 <= 0;

/* For each grouping constraint, we must have 2+ cells suppressed if we're choosing to have 2+ cells supppressed */

con two_more_con {i in con_set}: (sum{j in dec_set} choices[j] * constraints[i, j]) + choose_zero[i] * 100000000000 >= 2;