Frequencies for first 10,000 rows of blocktype variable in vindecode dataset : (block | type) | description | Freq. Percent Cum. ------------+----------------------------------- | 2,678 26.78 26.78 Horizontal | 107 1.07 27.85 IN-LINE | 2 0.02 27.87 In-Line | 3,029 30.29 58.16 Unknown | 2 0.02 58.18 V-type | 4,182 41.82 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016