I need some help with sorting a list of lists. Suppose I have a list of children given as following:
我需要一些帮助来排序列表。假设我有一个如下的孩子列表：
a <- list(name = "Ann", age = 9)
b <- list(name = "Bobby", age = 17)
c <- list(name = "Alex", age = 6)
my.list <- list(a, b, c)
I would like to sort their names by their age, so receive the following:
我想按年龄排序他们的名字，所以收到以下内容：
> "Alex" "Ann" "Bobby"
1 个解决方案
#1
5
a <- list(name = "Ann", age = 9)
b <- list(name = "Bobby", age = 17)
c <- list(name = "Alex", age = 6)
L <- list(a,b,c)
ages <- sapply(L,"[[","age")
names <- sapply(L,"[[","name")
names[order(ages)]
#1
5
a <- list(name = "Ann", age = 9)
b <- list(name = "Bobby", age = 17)
c <- list(name = "Alex", age = 6)
L <- list(a,b,c)
ages <- sapply(L,"[[","age")
names <- sapply(L,"[[","name")
names[order(ages)]