R 脚本 - 导出所有组合
R Script - Derived all combinations
我有一个类似于下面提供的数据集，我正在尝试创建一个包含两列的所有组合的输出数据集。
-
例如，我有以下输入数据集：
Region, Variable, Amount
Asia, Car, 15000
Asia, House, 175000
Asia, Truck, 200000
......
我想获得以下输出数据集：
Region, Variable1, Variable2, Amount1, Amount2
Asia, Car, Car, 15000, 15000
Asia, Car, House, 15000, 175000
Asia, Car, Truck, 175000, 200000
Asia, House, Car, 175000, 15000
......
经过初步研究，我发现库(plyr) 或expand.grid 可能有帮助，但我似乎无法弄清楚如何实现它。我非常感谢任何帮助！
您可以使用merge
input <- read.table(text = "Region Variable Amount
Asia Car 15000
Asia House 175000
Asia Truck 200000", header = T, stringsAsFactors = F)
merge(input, input, by = "Region", suffixes = c(".1", ".2"))
Region Variable.1 Amount.1 Variable.2 Amount.2
1 Asia Car 15000 Car 15000
2 Asia Car 15000 House 175000
3 Asia Car 15000 Truck 200000
4 Asia House 175000 Car 15000
5 Asia House 175000 House 175000
6 Asia House 175000 Truck 200000
7 Asia Truck 200000 Car 15000
8 Asia Truck 200000 House 175000
9 Asia Truck 200000 Truck 200000
我有一个类似于下面提供的数据集，我正在尝试创建一个包含两列的所有组合的输出数据集。
-
例如，我有以下输入数据集：
Region, Variable, Amount
Asia, Car, 15000
Asia, House, 175000
Asia, Truck, 200000
......
我想获得以下输出数据集：
Region, Variable1, Variable2, Amount1, Amount2
Asia, Car, Car, 15000, 15000
Asia, Car, House, 15000, 175000
Asia, Car, Truck, 175000, 200000
Asia, House, Car, 175000, 15000
......
经过初步研究，我发现库(plyr) 或expand.grid 可能有帮助，但我似乎无法弄清楚如何实现它。我非常感谢任何帮助！
您可以使用merge
input <- read.table(text = "Region Variable Amount
Asia Car 15000
Asia House 175000
Asia Truck 200000", header = T, stringsAsFactors = F)
merge(input, input, by = "Region", suffixes = c(".1", ".2"))
Region Variable.1 Amount.1 Variable.2 Amount.2
1 Asia Car 15000 Car 15000
2 Asia Car 15000 House 175000
3 Asia Car 15000 Truck 200000
4 Asia House 175000 Car 15000
5 Asia House 175000 House 175000
6 Asia House 175000 Truck 200000
7 Asia Truck 200000 Car 15000
8 Asia Truck 200000 House 175000
9 Asia Truck 200000 Truck 200000