如何通过R中data.table中的列名删除列？
我们可以通过将列设置为NULL来实现
示例
> library(data.table) > df <- data.frame(numbers = 1:10, x = runif(10,25,75)) > data_table <- data.table(df)
删除一列x
> data_table[, x:=NULL] > data_table numbers 1: 1 2: 2 3: 3 4: 4 5: 5 6: 6 7: 7 8: 8 9: 9 10: 10
删除两列
> df <- data.frame(numbers = 0:9, x = runif(10,25,75), y=rnorm(10))
> Data_table <- data.table(df)
Data_table[, c("x","y"):=NULL]
> Data_table
numbers
1: 0
2: 1
3: 2
4: 3
5: 4
6: 5
7: 6
8: 7
9: 8
10: 9