Turn a function that operates on a vector into a function that operates column-wise on a data.frame.
colwise(.fun, .cols = true, ...)
catcolwise(.fun, ...)
numcolwise(.fun, ...)catcolwise and numcolwise provide version that only operate
on discrete and numeric variables respectively.
# Count number of missing values
nmissing <- function(x) sum(is.na(x))
# Apply to every column in a data frame
colwise(nmissing)(baseball)
#> id year stint team lg g ab r h X2b X3b hr rbi sb cs bb so ibb hbp sh
#> 1 0 0 0 0 0 0 0 0 0 0 0 0 12 250 4525 0 1305 7528 377 960
#> sf gidp
#> 1 7390 5272
# This syntax looks a little different. It is shorthand for the
# the following:
f <- colwise(nmissing)
f(baseball)
#> id year stint team lg g ab r h X2b X3b hr rbi sb cs bb so ibb hbp sh
#> 1 0 0 0 0 0 0 0 0 0 0 0 0 12 250 4525 0 1305 7528 377 960
#> sf gidp
#> 1 7390 5272
# This is particularly useful in conjunction with d*ply
ddply(baseball, .(year), colwise(nmissing))
#> year id stint team lg g ab r h X2b X3b hr rbi sb cs bb so ibb hbp sh sf
#> 1 1871 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 7 7 7
#> 2 1872 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13
#> 3 1873 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13
#> 4 1874 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 15 15 15
#> 5 1875 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 17 17 17
#> 6 1876 0 0 0 0 0 0 0 0 0 0 0 0 15 15 0 0 15 15 15 15
#> 7 1877 0 0 0 0 0 0 0 0 0 0 0 0 16 16 0 0 16 16 16 16
#> 8 1878 0 0 0 0 0 0 0 0 0 0 0 0 17 17 0 0 17 17 17 17
#> 9 1879 0 0 0 0 0 0 0 0 0 0 0 0 25 25 0 0 25 25 25 25
#> 10 1880 0 0 0 0 0 0 0 0 0 0 0 0 28 28 0 0 28 28 28 28
#> 11 1881 0 0 0 0 0 0 0 0 0 0 0 0 36 36 0 0 36 36 36 36
#> 12 1882 0 0 0 0 0 0 0 0 0 0 0 3 28 35 0 7 35 35 35 35
#> 13 1883 0 0 0 0 0 0 0 0 0 0 0 0 25 38 0 13 38 38 38 38
#> 14 1884 0 0 0 0 0 0 0 0 0 0 0 9 27 53 0 26 53 36 53 53
#> 15 1885 0 0 0 0 0 0 0 0 0 0 0 0 33 50 0 17 50 33 50 50
#> 16 1886 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 20 51 31 51 51
#> 17 1887 0 0 0 0 0 0 0 0 0 0 0 0 0 56 0 21 56 0 56 56
#> 18 1888 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 20 60 0 60 60
#> 19 1889 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 57 0 57 57
#> 20 1890 0 0 0 0 0 0 0 0 0 0 0 0 0 72 0 11 72 0 72 72
#> 21 1891 0 0 0 0 0 0 0 0 0 0 0 0 0 77 0 0 77 0 77 77
#> 22 1892 0 0 0 0 0 0 0 0 0 0 0 0 0 75 0 0 75 0 75 75
#> 23 1893 0 0 0 0 0 0 0 0 0 0 0 0 0 68 0 0 68 0 68 68
#> 24 1894 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 0 66 0 66 66
#> 25 1895 0 0 0 0 0 0 0 0 0 0 0 0 0 70 0 0 70 0 0 70
#> 26 1896 0 0 0 0 0 0 0 0 0 0 0 0 0 74 0 0 74 0 0 74
#> 27 1897 0 0 0 0 0 0 0 0 0 0 0 0 0 75 0 75 75 0 0 75
#> 28 1898 0 0 0 0 0 0 0 0 0 0 0 0 0 78 0 79 78 0 0 78
#> 29 1899 0 0 0 0 0 0 0 0 0 0 0 0 0 75 0 77 75 0 0 75
#> 30 1900 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 69 69 0 0 69
#> 31 1901 0 0 0 0 0 0 0 0 0 0 0 0 0 83 0 83 83 0 0 83
#> 32 1902 0 0 0 0 0 0 0 0 0 0 0 0 0 87 0 87 87 0 0 87
#> 33 1903 0 0 0 0 0 0 0 0 0 0 0 0 0 79 0 79 79 0 0 79
#> 34 1904 0 0 0 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81
#> 35 1905 0 0 0 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82
#> 36 1906 0 0 0 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81
#> 37 1907 0 0 0 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82
#> 38 1908 0 0 0 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81
#> 39 1909 0 0 0 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82
#> 40 1910 0 0 0 0 0 0 0 0 0 0 0 0 0 75 0 40 75 0 0 75
#> 41 1911 0 0 0 0 0 0 0 0 0 0 0 0 0 85 0 41 85 0 0 85
#> 42 1912 0 0 0 0 0 0 0 0 0 0 0 0 0 97 0 51 97 0 0 97
#> 43 1913 0 0 0 0 0 0 0 0 0 0 0 0 0 101 0 0 101 0 0 101
#> 44 1914 0 0 0 0 0 0 0 0 0 0 0 0 0 72 0 0 107 0 0 107
#> 45 1915 0 0 0 0 0 0 0 0 0 0 0 0 0 62 0 0 133 0 0 133
#> 46 1916 0 0 0 0 0 0 0 0 0 0 0 0 0 102 0 0 121 1 0 121
#> 47 1917 0 0 0 0 0 0 0 0 0 0 0 0 0 112 0 0 112 0 0 112
#> 48 1918 0 0 0 0 0 0 0 0 0 0 0 0 0 109 0 0 109 0 0 109
#> 49 1919 0 0 0 0 0 0 0 0 0 0 0 0 0 122 0 0 122 0 0 122
#> 50 1920 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117
#> 51 1921 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117
#> 52 1922 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 115 0 0 115
#> 53 1923 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132
#> 54 1924 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132
#> 55 1925 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 135 0 0 135
#> 56 1926 0 0 0 0 0 0 0 0 0 0 0 0 0 68 0 0 135 0 0 135
#> 57 1927 0 0 0 0 0 0 0 0 0 0 0 0 0 67 0 0 132 0 0 132
#> 58 1928 0 0 0 0 0 0 0 0 0 0 0 0 0 68 0 0 133 0 0 133
#> 59 1929 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 0 131 0 0 131
#> 60 1930 0 0 0 0 0 0 0 0 0 0 0 0 0 65 0 0 131 0 0 131
#> 61 1931 0 0 0 0 0 0 0 0 0 0 0 0 0 59 0 0 125 0 0 125
#> 62 1932 0 0 0 0 0 0 0 0 0 0 0 0 0 65 0 0 129 0 0 129
#> 63 1933 0 0 0 0 0 0 0 0 0 0 0 0 0 62 0 0 131 0 0 131
#> 64 1934 0 0 0 0 0 0 0 0 0 0 0 0 0 59 0 0 132 0 0 132
#> 65 1935 0 0 0 0 0 0 0 0 0 0 0 0 0 64 0 0 126 0 0 126
#> 66 1936 0 0 0 0 0 0 0 0 0 0 0 0 0 58 0 0 128 0 0 128
#> 67 1937 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 121 0 0 121
#> 68 1938 0 0 0 0 0 0 0 0 0 0 0 0 0 56 0 0 117 0 0 117
#> 69 1939 0 0 0 0 0 0 0 0 0 0 0 0 0 64 0 0 129 0 0 129
#> 70 1940 0 0 0 0 0 0 0 0 0 0 0 0 0 61 0 0 121 0 0 121
#> 71 1941 0 0 0 0 0 0 0 0 0 0 0 0 0 64 0 0 130 0 0 130
#> 72 1942 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 118 0 0 118
#> 73 1943 0 0 0 0 0 0 0 0 0 0 0 0 0 58 0 0 101 0 0 101
#> 74 1944 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 88 0 0 88
#> 75 1945 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 87 0 0 87
#> 76 1946 0 0 0 0 0 0 0 0 0 0 0 0 0 56 0 0 120 0 0 120
#> 77 1947 0 0 0 0 0 0 0 0 0 0 0 0 0 62 0 0 121 0 0 121
#> 78 1948 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 112 0 0 112
#> 79 1949 0 0 0 0 0 0 0 0 0 0 0 0 0 65 0 0 117 0 0 117
#> 80 1950 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 118 0 0 118
#> 81 1951 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 125 0 0 125
#> 82 1952 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 142 0 0 142
#> 83 1953 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 141 0 0 141
#> 84 1954 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 138 0 0 0
#> 85 1955 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 86 1956 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 87 1957 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 88 1958 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 89 1959 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 90 1960 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 91 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 92 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 93 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 94 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 95 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 96 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 97 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 98 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 99 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 100 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 101 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 102 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 103 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 104 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 105 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 106 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 107 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 108 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 109 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 110 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 111 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 112 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 113 1983 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 114 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 115 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 116 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 117 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 118 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 119 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 120 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 121 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 122 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 123 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 124 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 125 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 126 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 127 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 128 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 129 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 130 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 131 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 132 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 133 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 134 2004 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
#> 135 2005 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 136 2006 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 137 2007 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> gidp
#> 1 7
#> 2 13
#> 3 13
#> 4 15
#> 5 17
#> 6 15
#> 7 17
#> 8 17
#> 9 25
#> 10 28
#> 11 36
#> 12 35
#> 13 38
#> 14 53
#> 15 50
#> 16 51
#> 17 56
#> 18 60
#> 19 57
#> 20 72
#> 21 77
#> 22 75
#> 23 68
#> 24 66
#> 25 70
#> 26 74
#> 27 75
#> 28 79
#> 29 77
#> 30 69
#> 31 83
#> 32 87
#> 33 79
#> 34 81
#> 35 82
#> 36 81
#> 37 82
#> 38 81
#> 39 82
#> 40 75
#> 41 85
#> 42 97
#> 43 101
#> 44 107
#> 45 133
#> 46 121
#> 47 112
#> 48 109
#> 49 122
#> 50 117
#> 51 117
#> 52 115
#> 53 132
#> 54 132
#> 55 136
#> 56 135
#> 57 132
#> 58 133
#> 59 131
#> 60 131
#> 61 125
#> 62 129
#> 63 69
#> 64 73
#> 65 62
#> 66 70
#> 67 67
#> 68 61
#> 69 0
#> 70 0
#> 71 0
#> 72 0
#> 73 0
#> 74 0
#> 75 0
#> 76 0
#> 77 0
#> 78 0
#> 79 0
#> 80 0
#> 81 0
#> 82 0
#> 83 0
#> 84 0
#> 85 0
#> 86 0
#> 87 0
#> 88 0
#> 89 0
#> 90 0
#> 91 0
#> 92 0
#> 93 0
#> 94 0
#> 95 0
#> 96 0
#> 97 0
#> 98 0
#> 99 0
#> 100 0
#> 101 0
#> 102 0
#> 103 0
#> 104 0
#> 105 0
#> 106 0
#> 107 0
#> 108 0
#> 109 0
#> 110 0
#> 111 0
#> 112 0
#> 113 0
#> 114 0
#> 115 0
#> 116 0
#> 117 0
#> 118 0
#> 119 0
#> 120 0
#> 121 0
#> 122 0
#> 123 0
#> 124 0
#> 125 0
#> 126 0
#> 127 0
#> 128 0
#> 129 0
#> 130 0
#> 131 0
#> 132 0
#> 133 0
#> 134 0
#> 135 0
#> 136 0
#> 137 0
# To operate only on specified columns, supply them as the second
# argument. Many different forms are accepted.
ddply(baseball, .(year), colwise(nmissing, .(sb, cs, so)))
#> year sb cs so
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 15 15 0
#> 7 1877 16 16 0
#> 8 1878 17 17 0
#> 9 1879 25 25 0
#> 10 1880 28 28 0
#> 11 1881 36 36 0
#> 12 1882 28 35 7
#> 13 1883 25 38 13
#> 14 1884 27 53 26
#> 15 1885 33 50 17
#> 16 1886 0 51 20
#> 17 1887 0 56 21
#> 18 1888 0 60 20
#> 19 1889 0 57 0
#> 20 1890 0 72 11
#> 21 1891 0 77 0
#> 22 1892 0 75 0
#> 23 1893 0 68 0
#> 24 1894 0 66 0
#> 25 1895 0 70 0
#> 26 1896 0 74 0
#> 27 1897 0 75 75
#> 28 1898 0 78 79
#> 29 1899 0 75 77
#> 30 1900 0 69 69
#> 31 1901 0 83 83
#> 32 1902 0 87 87
#> 33 1903 0 79 79
#> 34 1904 0 81 81
#> 35 1905 0 82 82
#> 36 1906 0 81 81
#> 37 1907 0 82 82
#> 38 1908 0 81 81
#> 39 1909 0 82 82
#> 40 1910 0 75 40
#> 41 1911 0 85 41
#> 42 1912 0 97 51
#> 43 1913 0 101 0
#> 44 1914 0 72 0
#> 45 1915 0 62 0
#> 46 1916 0 102 0
#> 47 1917 0 112 0
#> 48 1918 0 109 0
#> 49 1919 0 122 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 68 0
#> 57 1927 0 67 0
#> 58 1928 0 68 0
#> 59 1929 0 66 0
#> 60 1930 0 65 0
#> 61 1931 0 59 0
#> 62 1932 0 65 0
#> 63 1933 0 62 0
#> 64 1934 0 59 0
#> 65 1935 0 64 0
#> 66 1936 0 58 0
#> 67 1937 0 54 0
#> 68 1938 0 56 0
#> 69 1939 0 64 0
#> 70 1940 0 61 0
#> 71 1941 0 64 0
#> 72 1942 0 60 0
#> 73 1943 0 58 0
#> 74 1944 0 48 0
#> 75 1945 0 48 0
#> 76 1946 0 56 0
#> 77 1947 0 62 0
#> 78 1948 0 60 0
#> 79 1949 0 65 0
#> 80 1950 0 57 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
ddply(baseball, .(year), colwise(nmissing, c("sb", "cs", "so")))
#> year sb cs so
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 15 15 0
#> 7 1877 16 16 0
#> 8 1878 17 17 0
#> 9 1879 25 25 0
#> 10 1880 28 28 0
#> 11 1881 36 36 0
#> 12 1882 28 35 7
#> 13 1883 25 38 13
#> 14 1884 27 53 26
#> 15 1885 33 50 17
#> 16 1886 0 51 20
#> 17 1887 0 56 21
#> 18 1888 0 60 20
#> 19 1889 0 57 0
#> 20 1890 0 72 11
#> 21 1891 0 77 0
#> 22 1892 0 75 0
#> 23 1893 0 68 0
#> 24 1894 0 66 0
#> 25 1895 0 70 0
#> 26 1896 0 74 0
#> 27 1897 0 75 75
#> 28 1898 0 78 79
#> 29 1899 0 75 77
#> 30 1900 0 69 69
#> 31 1901 0 83 83
#> 32 1902 0 87 87
#> 33 1903 0 79 79
#> 34 1904 0 81 81
#> 35 1905 0 82 82
#> 36 1906 0 81 81
#> 37 1907 0 82 82
#> 38 1908 0 81 81
#> 39 1909 0 82 82
#> 40 1910 0 75 40
#> 41 1911 0 85 41
#> 42 1912 0 97 51
#> 43 1913 0 101 0
#> 44 1914 0 72 0
#> 45 1915 0 62 0
#> 46 1916 0 102 0
#> 47 1917 0 112 0
#> 48 1918 0 109 0
#> 49 1919 0 122 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 68 0
#> 57 1927 0 67 0
#> 58 1928 0 68 0
#> 59 1929 0 66 0
#> 60 1930 0 65 0
#> 61 1931 0 59 0
#> 62 1932 0 65 0
#> 63 1933 0 62 0
#> 64 1934 0 59 0
#> 65 1935 0 64 0
#> 66 1936 0 58 0
#> 67 1937 0 54 0
#> 68 1938 0 56 0
#> 69 1939 0 64 0
#> 70 1940 0 61 0
#> 71 1941 0 64 0
#> 72 1942 0 60 0
#> 73 1943 0 58 0
#> 74 1944 0 48 0
#> 75 1945 0 48 0
#> 76 1946 0 56 0
#> 77 1947 0 62 0
#> 78 1948 0 60 0
#> 79 1949 0 65 0
#> 80 1950 0 57 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
ddply(baseball, .(year), colwise(nmissing, ~ sb + cs + so))
#> year sb cs so
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 15 15 0
#> 7 1877 16 16 0
#> 8 1878 17 17 0
#> 9 1879 25 25 0
#> 10 1880 28 28 0
#> 11 1881 36 36 0
#> 12 1882 28 35 7
#> 13 1883 25 38 13
#> 14 1884 27 53 26
#> 15 1885 33 50 17
#> 16 1886 0 51 20
#> 17 1887 0 56 21
#> 18 1888 0 60 20
#> 19 1889 0 57 0
#> 20 1890 0 72 11
#> 21 1891 0 77 0
#> 22 1892 0 75 0
#> 23 1893 0 68 0
#> 24 1894 0 66 0
#> 25 1895 0 70 0
#> 26 1896 0 74 0
#> 27 1897 0 75 75
#> 28 1898 0 78 79
#> 29 1899 0 75 77
#> 30 1900 0 69 69
#> 31 1901 0 83 83
#> 32 1902 0 87 87
#> 33 1903 0 79 79
#> 34 1904 0 81 81
#> 35 1905 0 82 82
#> 36 1906 0 81 81
#> 37 1907 0 82 82
#> 38 1908 0 81 81
#> 39 1909 0 82 82
#> 40 1910 0 75 40
#> 41 1911 0 85 41
#> 42 1912 0 97 51
#> 43 1913 0 101 0
#> 44 1914 0 72 0
#> 45 1915 0 62 0
#> 46 1916 0 102 0
#> 47 1917 0 112 0
#> 48 1918 0 109 0
#> 49 1919 0 122 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 68 0
#> 57 1927 0 67 0
#> 58 1928 0 68 0
#> 59 1929 0 66 0
#> 60 1930 0 65 0
#> 61 1931 0 59 0
#> 62 1932 0 65 0
#> 63 1933 0 62 0
#> 64 1934 0 59 0
#> 65 1935 0 64 0
#> 66 1936 0 58 0
#> 67 1937 0 54 0
#> 68 1938 0 56 0
#> 69 1939 0 64 0
#> 70 1940 0 61 0
#> 71 1941 0 64 0
#> 72 1942 0 60 0
#> 73 1943 0 58 0
#> 74 1944 0 48 0
#> 75 1945 0 48 0
#> 76 1946 0 56 0
#> 77 1947 0 62 0
#> 78 1948 0 60 0
#> 79 1949 0 65 0
#> 80 1950 0 57 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
# Alternatively, you can specify a boolean function that determines
# whether or not a column should be included
ddply(baseball, .(year), colwise(nmissing, is.character))
#> year id team lg
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 0 0 0
#> 7 1877 0 0 0
#> 8 1878 0 0 0
#> 9 1879 0 0 0
#> 10 1880 0 0 0
#> 11 1881 0 0 0
#> 12 1882 0 0 0
#> 13 1883 0 0 0
#> 14 1884 0 0 0
#> 15 1885 0 0 0
#> 16 1886 0 0 0
#> 17 1887 0 0 0
#> 18 1888 0 0 0
#> 19 1889 0 0 0
#> 20 1890 0 0 0
#> 21 1891 0 0 0
#> 22 1892 0 0 0
#> 23 1893 0 0 0
#> 24 1894 0 0 0
#> 25 1895 0 0 0
#> 26 1896 0 0 0
#> 27 1897 0 0 0
#> 28 1898 0 0 0
#> 29 1899 0 0 0
#> 30 1900 0 0 0
#> 31 1901 0 0 0
#> 32 1902 0 0 0
#> 33 1903 0 0 0
#> 34 1904 0 0 0
#> 35 1905 0 0 0
#> 36 1906 0 0 0
#> 37 1907 0 0 0
#> 38 1908 0 0 0
#> 39 1909 0 0 0
#> 40 1910 0 0 0
#> 41 1911 0 0 0
#> 42 1912 0 0 0
#> 43 1913 0 0 0
#> 44 1914 0 0 0
#> 45 1915 0 0 0
#> 46 1916 0 0 0
#> 47 1917 0 0 0
#> 48 1918 0 0 0
#> 49 1919 0 0 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 0 0
#> 57 1927 0 0 0
#> 58 1928 0 0 0
#> 59 1929 0 0 0
#> 60 1930 0 0 0
#> 61 1931 0 0 0
#> 62 1932 0 0 0
#> 63 1933 0 0 0
#> 64 1934 0 0 0
#> 65 1935 0 0 0
#> 66 1936 0 0 0
#> 67 1937 0 0 0
#> 68 1938 0 0 0
#> 69 1939 0 0 0
#> 70 1940 0 0 0
#> 71 1941 0 0 0
#> 72 1942 0 0 0
#> 73 1943 0 0 0
#> 74 1944 0 0 0
#> 75 1945 0 0 0
#> 76 1946 0 0 0
#> 77 1947 0 0 0
#> 78 1948 0 0 0
#> 79 1949 0 0 0
#> 80 1950 0 0 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
ddply(baseball, .(year), colwise(nmissing, is.numeric))
#> year stint g ab r h X2b X3b hr rbi sb cs bb so ibb hbp sh sf gidp
#> 1 1871 0 0 0 0 0 0 0 0 0 0 0 0 0 7 7 7 7 7
#> 2 1872 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13 13
#> 3 1873 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13 13
#> 4 1874 0 0 0 0 0 0 0 0 0 0 0 0 0 15 15 15 15 15
#> 5 1875 0 0 0 0 0 0 0 0 0 0 0 0 0 17 17 17 17 17
#> 6 1876 0 0 0 0 0 0 0 0 0 15 15 0 0 15 15 15 15 15
#> 7 1877 0 0 0 0 0 0 0 0 0 16 16 0 0 16 16 16 16 17
#> 8 1878 0 0 0 0 0 0 0 0 0 17 17 0 0 17 17 17 17 17
#> 9 1879 0 0 0 0 0 0 0 0 0 25 25 0 0 25 25 25 25 25
#> 10 1880 0 0 0 0 0 0 0 0 0 28 28 0 0 28 28 28 28 28
#> 11 1881 0 0 0 0 0 0 0 0 0 36 36 0 0 36 36 36 36 36
#> 12 1882 0 0 0 0 0 0 0 0 3 28 35 0 7 35 35 35 35 35
#> 13 1883 0 0 0 0 0 0 0 0 0 25 38 0 13 38 38 38 38 38
#> 14 1884 0 0 0 0 0 0 0 0 9 27 53 0 26 53 36 53 53 53
#> 15 1885 0 0 0 0 0 0 0 0 0 33 50 0 17 50 33 50 50 50
#> 16 1886 0 0 0 0 0 0 0 0 0 0 51 0 20 51 31 51 51 51
#> 17 1887 0 0 0 0 0 0 0 0 0 0 56 0 21 56 0 56 56 56
#> 18 1888 0 0 0 0 0 0 0 0 0 0 60 0 20 60 0 60 60 60
#> 19 1889 0 0 0 0 0 0 0 0 0 0 57 0 0 57 0 57 57 57
#> 20 1890 0 0 0 0 0 0 0 0 0 0 72 0 11 72 0 72 72 72
#> 21 1891 0 0 0 0 0 0 0 0 0 0 77 0 0 77 0 77 77 77
#> 22 1892 0 0 0 0 0 0 0 0 0 0 75 0 0 75 0 75 75 75
#> 23 1893 0 0 0 0 0 0 0 0 0 0 68 0 0 68 0 68 68 68
#> 24 1894 0 0 0 0 0 0 0 0 0 0 66 0 0 66 0 66 66 66
#> 25 1895 0 0 0 0 0 0 0 0 0 0 70 0 0 70 0 0 70 70
#> 26 1896 0 0 0 0 0 0 0 0 0 0 74 0 0 74 0 0 74 74
#> 27 1897 0 0 0 0 0 0 0 0 0 0 75 0 75 75 0 0 75 75
#> 28 1898 0 0 0 0 0 0 0 0 0 0 78 0 79 78 0 0 78 79
#> 29 1899 0 0 0 0 0 0 0 0 0 0 75 0 77 75 0 0 75 77
#> 30 1900 0 0 0 0 0 0 0 0 0 0 69 0 69 69 0 0 69 69
#> 31 1901 0 0 0 0 0 0 0 0 0 0 83 0 83 83 0 0 83 83
#> 32 1902 0 0 0 0 0 0 0 0 0 0 87 0 87 87 0 0 87 87
#> 33 1903 0 0 0 0 0 0 0 0 0 0 79 0 79 79 0 0 79 79
#> 34 1904 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 35 1905 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 36 1906 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 37 1907 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 38 1908 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 39 1909 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 40 1910 0 0 0 0 0 0 0 0 0 0 75 0 40 75 0 0 75 75
#> 41 1911 0 0 0 0 0 0 0 0 0 0 85 0 41 85 0 0 85 85
#> 42 1912 0 0 0 0 0 0 0 0 0 0 97 0 51 97 0 0 97 97
#> 43 1913 0 0 0 0 0 0 0 0 0 0 101 0 0 101 0 0 101 101
#> 44 1914 0 0 0 0 0 0 0 0 0 0 72 0 0 107 0 0 107 107
#> 45 1915 0 0 0 0 0 0 0 0 0 0 62 0 0 133 0 0 133 133
#> 46 1916 0 0 0 0 0 0 0 0 0 0 102 0 0 121 1 0 121 121
#> 47 1917 0 0 0 0 0 0 0 0 0 0 112 0 0 112 0 0 112 112
#> 48 1918 0 0 0 0 0 0 0 0 0 0 109 0 0 109 0 0 109 109
#> 49 1919 0 0 0 0 0 0 0 0 0 0 122 0 0 122 0 0 122 122
#> 50 1920 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117 117
#> 51 1921 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117 117
#> 52 1922 0 0 0 0 0 0 0 0 0 0 0 0 0 115 0 0 115 115
#> 53 1923 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132 132
#> 54 1924 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132 132
#> 55 1925 0 0 0 0 0 0 0 0 0 0 0 0 0 135 0 0 135 136
#> 56 1926 0 0 0 0 0 0 0 0 0 0 68 0 0 135 0 0 135 135
#> 57 1927 0 0 0 0 0 0 0 0 0 0 67 0 0 132 0 0 132 132
#> 58 1928 0 0 0 0 0 0 0 0 0 0 68 0 0 133 0 0 133 133
#> 59 1929 0 0 0 0 0 0 0 0 0 0 66 0 0 131 0 0 131 131
#> 60 1930 0 0 0 0 0 0 0 0 0 0 65 0 0 131 0 0 131 131
#> 61 1931 0 0 0 0 0 0 0 0 0 0 59 0 0 125 0 0 125 125
#> 62 1932 0 0 0 0 0 0 0 0 0 0 65 0 0 129 0 0 129 129
#> 63 1933 0 0 0 0 0 0 0 0 0 0 62 0 0 131 0 0 131 69
#> 64 1934 0 0 0 0 0 0 0 0 0 0 59 0 0 132 0 0 132 73
#> 65 1935 0 0 0 0 0 0 0 0 0 0 64 0 0 126 0 0 126 62
#> 66 1936 0 0 0 0 0 0 0 0 0 0 58 0 0 128 0 0 128 70
#> 67 1937 0 0 0 0 0 0 0 0 0 0 54 0 0 121 0 0 121 67
#> 68 1938 0 0 0 0 0 0 0 0 0 0 56 0 0 117 0 0 117 61
#> 69 1939 0 0 0 0 0 0 0 0 0 0 64 0 0 129 0 0 129 0
#> 70 1940 0 0 0 0 0 0 0 0 0 0 61 0 0 121 0 0 121 0
#> 71 1941 0 0 0 0 0 0 0 0 0 0 64 0 0 130 0 0 130 0
#> 72 1942 0 0 0 0 0 0 0 0 0 0 60 0 0 118 0 0 118 0
#> 73 1943 0 0 0 0 0 0 0 0 0 0 58 0 0 101 0 0 101 0
#> 74 1944 0 0 0 0 0 0 0 0 0 0 48 0 0 88 0 0 88 0
#> 75 1945 0 0 0 0 0 0 0 0 0 0 48 0 0 87 0 0 87 0
#> 76 1946 0 0 0 0 0 0 0 0 0 0 56 0 0 120 0 0 120 0
#> 77 1947 0 0 0 0 0 0 0 0 0 0 62 0 0 121 0 0 121 0
#> 78 1948 0 0 0 0 0 0 0 0 0 0 60 0 0 112 0 0 112 0
#> 79 1949 0 0 0 0 0 0 0 0 0 0 65 0 0 117 0 0 117 0
#> 80 1950 0 0 0 0 0 0 0 0 0 0 57 0 0 118 0 0 118 0
#> 81 1951 0 0 0 0 0 0 0 0 0 0 0 0 0 125 0 0 125 0
#> 82 1952 0 0 0 0 0 0 0 0 0 0 0 0 0 142 0 0 142 0
#> 83 1953 0 0 0 0 0 0 0 0 0 0 0 0 0 141 0 0 141 0
#> 84 1954 0 0 0 0 0 0 0 0 0 0 0 0 0 138 0 0 0 0
#> 85 1955 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 86 1956 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 87 1957 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 88 1958 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 89 1959 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 90 1960 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 91 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 92 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 93 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 94 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 95 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 96 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 97 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 98 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 99 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 100 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 101 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 102 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 103 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 104 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 105 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 106 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 107 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 108 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 109 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 110 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 111 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 112 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 113 1983 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 114 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 115 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 116 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 117 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 118 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 119 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 120 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 121 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 122 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 123 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 124 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 125 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 126 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 127 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 128 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 129 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 130 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 131 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 132 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 133 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 134 2004 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
#> 135 2005 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 136 2006 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 137 2007 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ddply(baseball, .(year), colwise(nmissing, is.discrete))
#> year id team lg
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 0 0 0
#> 7 1877 0 0 0
#> 8 1878 0 0 0
#> 9 1879 0 0 0
#> 10 1880 0 0 0
#> 11 1881 0 0 0
#> 12 1882 0 0 0
#> 13 1883 0 0 0
#> 14 1884 0 0 0
#> 15 1885 0 0 0
#> 16 1886 0 0 0
#> 17 1887 0 0 0
#> 18 1888 0 0 0
#> 19 1889 0 0 0
#> 20 1890 0 0 0
#> 21 1891 0 0 0
#> 22 1892 0 0 0
#> 23 1893 0 0 0
#> 24 1894 0 0 0
#> 25 1895 0 0 0
#> 26 1896 0 0 0
#> 27 1897 0 0 0
#> 28 1898 0 0 0
#> 29 1899 0 0 0
#> 30 1900 0 0 0
#> 31 1901 0 0 0
#> 32 1902 0 0 0
#> 33 1903 0 0 0
#> 34 1904 0 0 0
#> 35 1905 0 0 0
#> 36 1906 0 0 0
#> 37 1907 0 0 0
#> 38 1908 0 0 0
#> 39 1909 0 0 0
#> 40 1910 0 0 0
#> 41 1911 0 0 0
#> 42 1912 0 0 0
#> 43 1913 0 0 0
#> 44 1914 0 0 0
#> 45 1915 0 0 0
#> 46 1916 0 0 0
#> 47 1917 0 0 0
#> 48 1918 0 0 0
#> 49 1919 0 0 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 0 0
#> 57 1927 0 0 0
#> 58 1928 0 0 0
#> 59 1929 0 0 0
#> 60 1930 0 0 0
#> 61 1931 0 0 0
#> 62 1932 0 0 0
#> 63 1933 0 0 0
#> 64 1934 0 0 0
#> 65 1935 0 0 0
#> 66 1936 0 0 0
#> 67 1937 0 0 0
#> 68 1938 0 0 0
#> 69 1939 0 0 0
#> 70 1940 0 0 0
#> 71 1941 0 0 0
#> 72 1942 0 0 0
#> 73 1943 0 0 0
#> 74 1944 0 0 0
#> 75 1945 0 0 0
#> 76 1946 0 0 0
#> 77 1947 0 0 0
#> 78 1948 0 0 0
#> 79 1949 0 0 0
#> 80 1950 0 0 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
# These last two cases are particularly common, so some shortcuts are
# provided:
ddply(baseball, .(year), numcolwise(nmissing))
#> year stint g ab r h X2b X3b hr rbi sb cs bb so ibb hbp sh sf gidp
#> 1 1871 0 0 0 0 0 0 0 0 0 0 0 0 0 7 7 7 7 7
#> 2 1872 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13 13
#> 3 1873 0 0 0 0 0 0 0 0 0 0 0 0 0 13 13 13 13 13
#> 4 1874 0 0 0 0 0 0 0 0 0 0 0 0 0 15 15 15 15 15
#> 5 1875 0 0 0 0 0 0 0 0 0 0 0 0 0 17 17 17 17 17
#> 6 1876 0 0 0 0 0 0 0 0 0 15 15 0 0 15 15 15 15 15
#> 7 1877 0 0 0 0 0 0 0 0 0 16 16 0 0 16 16 16 16 17
#> 8 1878 0 0 0 0 0 0 0 0 0 17 17 0 0 17 17 17 17 17
#> 9 1879 0 0 0 0 0 0 0 0 0 25 25 0 0 25 25 25 25 25
#> 10 1880 0 0 0 0 0 0 0 0 0 28 28 0 0 28 28 28 28 28
#> 11 1881 0 0 0 0 0 0 0 0 0 36 36 0 0 36 36 36 36 36
#> 12 1882 0 0 0 0 0 0 0 0 3 28 35 0 7 35 35 35 35 35
#> 13 1883 0 0 0 0 0 0 0 0 0 25 38 0 13 38 38 38 38 38
#> 14 1884 0 0 0 0 0 0 0 0 9 27 53 0 26 53 36 53 53 53
#> 15 1885 0 0 0 0 0 0 0 0 0 33 50 0 17 50 33 50 50 50
#> 16 1886 0 0 0 0 0 0 0 0 0 0 51 0 20 51 31 51 51 51
#> 17 1887 0 0 0 0 0 0 0 0 0 0 56 0 21 56 0 56 56 56
#> 18 1888 0 0 0 0 0 0 0 0 0 0 60 0 20 60 0 60 60 60
#> 19 1889 0 0 0 0 0 0 0 0 0 0 57 0 0 57 0 57 57 57
#> 20 1890 0 0 0 0 0 0 0 0 0 0 72 0 11 72 0 72 72 72
#> 21 1891 0 0 0 0 0 0 0 0 0 0 77 0 0 77 0 77 77 77
#> 22 1892 0 0 0 0 0 0 0 0 0 0 75 0 0 75 0 75 75 75
#> 23 1893 0 0 0 0 0 0 0 0 0 0 68 0 0 68 0 68 68 68
#> 24 1894 0 0 0 0 0 0 0 0 0 0 66 0 0 66 0 66 66 66
#> 25 1895 0 0 0 0 0 0 0 0 0 0 70 0 0 70 0 0 70 70
#> 26 1896 0 0 0 0 0 0 0 0 0 0 74 0 0 74 0 0 74 74
#> 27 1897 0 0 0 0 0 0 0 0 0 0 75 0 75 75 0 0 75 75
#> 28 1898 0 0 0 0 0 0 0 0 0 0 78 0 79 78 0 0 78 79
#> 29 1899 0 0 0 0 0 0 0 0 0 0 75 0 77 75 0 0 75 77
#> 30 1900 0 0 0 0 0 0 0 0 0 0 69 0 69 69 0 0 69 69
#> 31 1901 0 0 0 0 0 0 0 0 0 0 83 0 83 83 0 0 83 83
#> 32 1902 0 0 0 0 0 0 0 0 0 0 87 0 87 87 0 0 87 87
#> 33 1903 0 0 0 0 0 0 0 0 0 0 79 0 79 79 0 0 79 79
#> 34 1904 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 35 1905 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 36 1906 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 37 1907 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 38 1908 0 0 0 0 0 0 0 0 0 0 81 0 81 81 0 0 81 81
#> 39 1909 0 0 0 0 0 0 0 0 0 0 82 0 82 82 0 0 82 82
#> 40 1910 0 0 0 0 0 0 0 0 0 0 75 0 40 75 0 0 75 75
#> 41 1911 0 0 0 0 0 0 0 0 0 0 85 0 41 85 0 0 85 85
#> 42 1912 0 0 0 0 0 0 0 0 0 0 97 0 51 97 0 0 97 97
#> 43 1913 0 0 0 0 0 0 0 0 0 0 101 0 0 101 0 0 101 101
#> 44 1914 0 0 0 0 0 0 0 0 0 0 72 0 0 107 0 0 107 107
#> 45 1915 0 0 0 0 0 0 0 0 0 0 62 0 0 133 0 0 133 133
#> 46 1916 0 0 0 0 0 0 0 0 0 0 102 0 0 121 1 0 121 121
#> 47 1917 0 0 0 0 0 0 0 0 0 0 112 0 0 112 0 0 112 112
#> 48 1918 0 0 0 0 0 0 0 0 0 0 109 0 0 109 0 0 109 109
#> 49 1919 0 0 0 0 0 0 0 0 0 0 122 0 0 122 0 0 122 122
#> 50 1920 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117 117
#> 51 1921 0 0 0 0 0 0 0 0 0 0 0 0 0 117 0 0 117 117
#> 52 1922 0 0 0 0 0 0 0 0 0 0 0 0 0 115 0 0 115 115
#> 53 1923 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132 132
#> 54 1924 0 0 0 0 0 0 0 0 0 0 0 0 0 132 0 0 132 132
#> 55 1925 0 0 0 0 0 0 0 0 0 0 0 0 0 135 0 0 135 136
#> 56 1926 0 0 0 0 0 0 0 0 0 0 68 0 0 135 0 0 135 135
#> 57 1927 0 0 0 0 0 0 0 0 0 0 67 0 0 132 0 0 132 132
#> 58 1928 0 0 0 0 0 0 0 0 0 0 68 0 0 133 0 0 133 133
#> 59 1929 0 0 0 0 0 0 0 0 0 0 66 0 0 131 0 0 131 131
#> 60 1930 0 0 0 0 0 0 0 0 0 0 65 0 0 131 0 0 131 131
#> 61 1931 0 0 0 0 0 0 0 0 0 0 59 0 0 125 0 0 125 125
#> 62 1932 0 0 0 0 0 0 0 0 0 0 65 0 0 129 0 0 129 129
#> 63 1933 0 0 0 0 0 0 0 0 0 0 62 0 0 131 0 0 131 69
#> 64 1934 0 0 0 0 0 0 0 0 0 0 59 0 0 132 0 0 132 73
#> 65 1935 0 0 0 0 0 0 0 0 0 0 64 0 0 126 0 0 126 62
#> 66 1936 0 0 0 0 0 0 0 0 0 0 58 0 0 128 0 0 128 70
#> 67 1937 0 0 0 0 0 0 0 0 0 0 54 0 0 121 0 0 121 67
#> 68 1938 0 0 0 0 0 0 0 0 0 0 56 0 0 117 0 0 117 61
#> 69 1939 0 0 0 0 0 0 0 0 0 0 64 0 0 129 0 0 129 0
#> 70 1940 0 0 0 0 0 0 0 0 0 0 61 0 0 121 0 0 121 0
#> 71 1941 0 0 0 0 0 0 0 0 0 0 64 0 0 130 0 0 130 0
#> 72 1942 0 0 0 0 0 0 0 0 0 0 60 0 0 118 0 0 118 0
#> 73 1943 0 0 0 0 0 0 0 0 0 0 58 0 0 101 0 0 101 0
#> 74 1944 0 0 0 0 0 0 0 0 0 0 48 0 0 88 0 0 88 0
#> 75 1945 0 0 0 0 0 0 0 0 0 0 48 0 0 87 0 0 87 0
#> 76 1946 0 0 0 0 0 0 0 0 0 0 56 0 0 120 0 0 120 0
#> 77 1947 0 0 0 0 0 0 0 0 0 0 62 0 0 121 0 0 121 0
#> 78 1948 0 0 0 0 0 0 0 0 0 0 60 0 0 112 0 0 112 0
#> 79 1949 0 0 0 0 0 0 0 0 0 0 65 0 0 117 0 0 117 0
#> 80 1950 0 0 0 0 0 0 0 0 0 0 57 0 0 118 0 0 118 0
#> 81 1951 0 0 0 0 0 0 0 0 0 0 0 0 0 125 0 0 125 0
#> 82 1952 0 0 0 0 0 0 0 0 0 0 0 0 0 142 0 0 142 0
#> 83 1953 0 0 0 0 0 0 0 0 0 0 0 0 0 141 0 0 141 0
#> 84 1954 0 0 0 0 0 0 0 0 0 0 0 0 0 138 0 0 0 0
#> 85 1955 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 86 1956 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 87 1957 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 88 1958 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 89 1959 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 90 1960 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 91 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 92 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 93 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 94 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 95 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 96 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 97 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 98 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 99 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 100 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 101 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 102 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 103 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 104 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 105 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 106 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 107 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 108 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 109 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 110 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 111 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 112 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 113 1983 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 114 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 115 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 116 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 117 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 118 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 119 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 120 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 121 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 122 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 123 1993 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 124 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 125 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 126 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 127 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 128 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 129 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 130 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 131 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 132 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 133 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 134 2004 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
#> 135 2005 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 136 2006 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
#> 137 2007 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ddply(baseball, .(year), catcolwise(nmissing))
#> year id team lg
#> 1 1871 0 0 0
#> 2 1872 0 0 0
#> 3 1873 0 0 0
#> 4 1874 0 0 0
#> 5 1875 0 0 0
#> 6 1876 0 0 0
#> 7 1877 0 0 0
#> 8 1878 0 0 0
#> 9 1879 0 0 0
#> 10 1880 0 0 0
#> 11 1881 0 0 0
#> 12 1882 0 0 0
#> 13 1883 0 0 0
#> 14 1884 0 0 0
#> 15 1885 0 0 0
#> 16 1886 0 0 0
#> 17 1887 0 0 0
#> 18 1888 0 0 0
#> 19 1889 0 0 0
#> 20 1890 0 0 0
#> 21 1891 0 0 0
#> 22 1892 0 0 0
#> 23 1893 0 0 0
#> 24 1894 0 0 0
#> 25 1895 0 0 0
#> 26 1896 0 0 0
#> 27 1897 0 0 0
#> 28 1898 0 0 0
#> 29 1899 0 0 0
#> 30 1900 0 0 0
#> 31 1901 0 0 0
#> 32 1902 0 0 0
#> 33 1903 0 0 0
#> 34 1904 0 0 0
#> 35 1905 0 0 0
#> 36 1906 0 0 0
#> 37 1907 0 0 0
#> 38 1908 0 0 0
#> 39 1909 0 0 0
#> 40 1910 0 0 0
#> 41 1911 0 0 0
#> 42 1912 0 0 0
#> 43 1913 0 0 0
#> 44 1914 0 0 0
#> 45 1915 0 0 0
#> 46 1916 0 0 0
#> 47 1917 0 0 0
#> 48 1918 0 0 0
#> 49 1919 0 0 0
#> 50 1920 0 0 0
#> 51 1921 0 0 0
#> 52 1922 0 0 0
#> 53 1923 0 0 0
#> 54 1924 0 0 0
#> 55 1925 0 0 0
#> 56 1926 0 0 0
#> 57 1927 0 0 0
#> 58 1928 0 0 0
#> 59 1929 0 0 0
#> 60 1930 0 0 0
#> 61 1931 0 0 0
#> 62 1932 0 0 0
#> 63 1933 0 0 0
#> 64 1934 0 0 0
#> 65 1935 0 0 0
#> 66 1936 0 0 0
#> 67 1937 0 0 0
#> 68 1938 0 0 0
#> 69 1939 0 0 0
#> 70 1940 0 0 0
#> 71 1941 0 0 0
#> 72 1942 0 0 0
#> 73 1943 0 0 0
#> 74 1944 0 0 0
#> 75 1945 0 0 0
#> 76 1946 0 0 0
#> 77 1947 0 0 0
#> 78 1948 0 0 0
#> 79 1949 0 0 0
#> 80 1950 0 0 0
#> 81 1951 0 0 0
#> 82 1952 0 0 0
#> 83 1953 0 0 0
#> 84 1954 0 0 0
#> 85 1955 0 0 0
#> 86 1956 0 0 0
#> 87 1957 0 0 0
#> 88 1958 0 0 0
#> 89 1959 0 0 0
#> 90 1960 0 0 0
#> 91 1961 0 0 0
#> 92 1962 0 0 0
#> 93 1963 0 0 0
#> 94 1964 0 0 0
#> 95 1965 0 0 0
#> 96 1966 0 0 0
#> 97 1967 0 0 0
#> 98 1968 0 0 0
#> 99 1969 0 0 0
#> 100 1970 0 0 0
#> 101 1971 0 0 0
#> 102 1972 0 0 0
#> 103 1973 0 0 0
#> 104 1974 0 0 0
#> 105 1975 0 0 0
#> 106 1976 0 0 0
#> 107 1977 0 0 0
#> 108 1978 0 0 0
#> 109 1979 0 0 0
#> 110 1980 0 0 0
#> 111 1981 0 0 0
#> 112 1982 0 0 0
#> 113 1983 0 0 0
#> 114 1984 0 0 0
#> 115 1985 0 0 0
#> 116 1986 0 0 0
#> 117 1987 0 0 0
#> 118 1988 0 0 0
#> 119 1989 0 0 0
#> 120 1990 0 0 0
#> 121 1991 0 0 0
#> 122 1992 0 0 0
#> 123 1993 0 0 0
#> 124 1994 0 0 0
#> 125 1995 0 0 0
#> 126 1996 0 0 0
#> 127 1997 0 0 0
#> 128 1998 0 0 0
#> 129 1999 0 0 0
#> 130 2000 0 0 0
#> 131 2001 0 0 0
#> 132 2002 0 0 0
#> 133 2003 0 0 0
#> 134 2004 0 0 0
#> 135 2005 0 0 0
#> 136 2006 0 0 0
#> 137 2007 0 0 0
# You can supply additional arguments to either colwise, or the function
# it generates:
numcolwise(mean)(baseball, na.rm = TRUE)
#> year stint g ab r h X2b X3b
#> 1 1961.068 1.092723 72.81764 225.4049 31.7805 61.7569 10.45242 2.194064
#> hr rbi sb cs bb so ibb hbp
#> 1 5.234204 29.58657 5.168353 2.099744 22.49472 29.26223 2.291793 1.543195
#> sh sf gidp
#> 1 3.388013 1.842477 4.773726
numcolwise(mean, na.rm = TRUE)(baseball)
#> year stint g ab r h X2b X3b
#> 1 1961.068 1.092723 72.81764 225.4049 31.7805 61.7569 10.45242 2.194064
#> hr rbi sb cs bb so ibb hbp
#> 1 5.234204 29.58657 5.168353 2.099744 22.49472 29.26223 2.291793 1.543195
#> sh sf gidp
#> 1 3.388013 1.842477 4.773726