year month day species_id weight 1 1977 8 19 DO 52 2 1977 10 17 DO 33 3 1977 10 17 DO 50 4 1977 10 17 DO 48 5 1977 10 17 DO 31 6 1977 10 18 DO 41 7 1977 11 12 DO 44 8 1977 11 12 DO 48 9 1977 11 14 DO 39 10 1977 12 10 DO 40 11 1977 12 10 DO 45 12 1977 12 11 DO 41 13 1978 1 8 DO 42 14 1978 3 13 DO 57 15 1978 4 9 DO 55 16 1978 5 18 DO 18 17 1978 5 19 DO 54 18 1978 5 19 DO 37 19 1978 6 8 DO 55 20 1978 6 8 DO 55 21 1978 6 8 DO 23 22 1978 6 9 DO 38 23 1978 7 7 DO 51 24 1978 7 7 DO 33 25 1978 8 4 DO 38 ... [] reached 'max' / getOption("max.print") -- omitted 2827 rows ] year species_id hindfoot_length 1 1995 PP 23 2 1995 PP 22 3 1995 PP 22 4 1995 PP 21 5 1995 PP 21 6 1995 PP 20 7 1995 PP 22 8 1995 PP 24 9 1995 PP 22 10 1995 PP 22 11 1995 PP 23 12 1995 PP 22 13 1995 PP 21 14 1995 PP 21 15 1995 PP 20 16 1995 PP 22 17 1995 PP 23 18 1995 PP 22 19 1995 PP 22 20 1995 PP 21 21 1995 PP 23 22 1995 PP 22 23 1995 PP 22 24 1995 PP 23 25 1995 PP 23 ... [ reached 'max' / getOption("max.print") -- omitted 5125 rows ] # A tibble: 340 x 3 # Groups: species_id [25] species_id year `mean(hindfoot_length)` 1 AH 1999 35 2 AH 2000 31 3 BA 1989 13 4 BA 1990 13.8 5 BA 1991 12.9 6 BA 1992 12 7 DM 1977 35.7 8 DM 1978 36.1 9 DM 1979 35.9 10 DM 1980 35.8 # … with 330 more rows year genus species weight plot_type 1 1977 Dipodomys merriami NA Control 2 1977 Dipodomys merriami NA Rodent Exclosure 3 1977 Dipodomys merriami NA Long-term Krat Exclosure 4 1977 Dipodomys merriami NA Spectab exclosure 5 1977 Dipodomys merriami NA Spectab exclosure 6 1977 Dipodomys spectabilis NA Rodent Exclosure 7 1977 Dipodomys merriami NA Rodent Exclosure 8 1977 Dipodomys merriami NA Long-term Krat Exclosure 9 1977 Dipodomys merriami NA Control 10 1977 Dipodomys merriami NA Short-term Krat Exclosure 11 1977 Dipodomys merriami NA Control 12 1977 Dipodomys spectabilis NA Long-term Krat Exclosure 13 1977 Dipodomys spectabilis NA Control 14 1977 Dipodomys merriami NA Control 15 1977 Dipodomys merriami NA Short-term Krat Exclosure 16 1977 Dipodomys merriami NA Spectab exclosure 17 1977 Dipodomys merriami NA Long-term Krat Exclosure 18 1977 Dipodomys merriami NA Long-term Krat Exclosure 19 1977 Dipodomys merriami NA Control 20 1977 Dipodomys spectabilis NA Rodent Exclosure 21 1977 Dipodomys merriami NA Long-term Krat Exclosure 22 1977 Dipodomys merriami NA Rodent Exclosure 23 1977 Dipodomys merriami NA Control 24 1977 Dipodomys merriami NA Control 25 1977 Dipodomys merriami NA Short-term Krat Exclosure ... [ reached 'max' / getOption("max.print") -- omitted 15967 rows ]