You can use the RESET statement with the AUTONAME option to automatically display row and column headings. If your matrix has rows and columns, the row headings are ROW1 to ROW and the column headings are COL1 to COL. For example, the following statements produce the subsequent matrix:

coffee={4 2 2 3 2, 3 3 1 2 1, 2 1 0 2 1, 5 4 4 3 4};
reset autoname;
print coffee;