Frequencies for first 10,000 rows of fuelinj variable in vindecode dataset : the type of | fuel | injection | Freq. Percent Cum. ------------+----------------------------------- | 3,306 33.06 33.06 B | 3 0.03 33.09 D | 531 5.31 38.40 M | 354 3.54 41.94 NA | 44 0.44 42.38 P | 13 0.13 42.51 R | 14 0.14 42.65 S | 750 7.50 50.15 U | 4,985 49.85 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016