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我正在寻找一种将键值对数据框转换为“衣衫褴褛”列表的通用方法。将键值对转换为“衣衫褴褛”列表
key <- c("1","1","2")
val <- c("101","102","101")
x <- data.frame(key,val)
所需的输出:
[[1]]
[1] "101" "102"
[[2]]
[1] "101"
我正在寻找一种将键值对数据框转换为“衣衫褴褛”列表的通用方法。将键值对转换为“衣衫褴褛”列表
key <- c("1","1","2")
val <- c("101","102","101")
x <- data.frame(key,val)
所需的输出:
[[1]]
[1] "101" "102"
[[2]]
[1] "101"
我们可以使用split
setNames(split(as.character(x$val), x$key), NULL)
#[[1]]
#[1] "101" "102"
#[[2]]
#[1] "101"
或用unstack
unstack(x, as.character(val)~key)