> install.packages("plyr", repo="http://cran.r-project.org",dep=TRUE)
> library(plyr)
> x <- trees[c("Girth","Height")]
> x
Girth Height
1 8.3 70
2 8.6 65
3 8.8 63
...
27 17.5 82
28 17.9 80
29 18.0 80
30 18.0 80
31 20.6 87
> y <- trees[c("Height","Volume")]
> y
Height Volume
1 70 10.3
2 65 10.3
3 63 10.2
4 72 16.4
...
27 82 55.7
28 80 58.3
29 80 51.5
30 80 51.0
31 87 77.0
> rbind(x,y)
Error in match.names(clabs, names(xi)) :
names do not match previous names
> rbind.fill(x,y)Girth Height Volume 1 8.3 70 NA 2 8.6 65 NA 3 8.8 63 NA 4 10.5 72 NA 5 10.7 81 NA 6 10.8 83 NA 7 11.0 66 NA 8 11.0 75 NA 9 11.1 80 NA 10 11.2 75 NA 11 11.3 79 NA 12 11.4 76 NA 13 11.4 76 NA 14 11.7 69 NA 15 12.0 75 NA 16 12.9 74 NA 17 12.9 85 NA 18 13.3 86 NA 19 13.7 71 NA 20 13.8 64 NA 21 14.0 78 NA 22 14.2 80 NA 23 14.5 74 NA 24 16.0 72 NA 25 16.3 77 NA 26 17.3 81 NA 27 17.5 82 NA 28 17.9 80 NA 29 18.0 80 NA 30 18.0 80 NA 31 20.6 87 NA 32 NA 70 10.3 33 NA 65 10.3 34 NA 63 10.2 35 NA 72 16.4 36 NA 81 18.8 37 NA 83 19.7 38 NA 66 15.6 39 NA 75 18.2 40 NA 80 22.6 41 NA 75 19.9 42 NA 79 24.2 43 NA 76 21.0 44 NA 76 21.4 45 NA 69 21.3 46 NA 75 19.1 47 NA 74 22.2 48 NA 85 33.8 49 NA 86 27.4 50 NA 71 25.7 51 NA 64 24.9 52 NA 78 34.5 53 NA 80 31.7 54 NA 74 36.3 55 NA 72 38.3 56 NA 77 42.6 57 NA 81 55.4 58 NA 82 55.7 59 NA 80 58.3 60 NA 80 51.5 61 NA 80 51.0 62 NA 87 77.0
