Frequencies for first 10,000 rows of vlvclndr variable in vindecode dataset : (valves per | cylinder) | number of | intake/exha | ust valves | per | cylinder. | Freq. Percent Cum. ------------+----------------------------------- | 961 9.61 9.61 0 | 4,687 46.87 56.48 2 | 1,003 10.03 66.51 3 | 44 0.44 66.95 4 | 3,301 33.01 99.96 5 | 4 0.04 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016