DATA test;
INPUT it1 it2 it3 it4 count;
DATALINES;
1 1 1 1 5
1 1 1 2 5
1 1 2 1 9
1 1 2 2 8
1 2 1 2 5
1 2 2 1 8
1 2 2 2 4
2 1 1 1 5
2 1 1 2 3
2 1 2 1 6
2 1 2 2 8
2 2 1 1 3
2 2 1 2 7
2 2 2 1 5
2 2 2 2 10
;
RUN;
PROC LCA DATA=test;
NCLASS 2;
ITEMS it1 it2 it3 it4;
CATEGORIES 2 2 2 2;
FREQ count;
SEED 100000;
RHO PRIOR=1;
RUN;