R：按名称对命名向量中的元素进行排序

Question

我有一个命名字符向量，我想按名称对其进行排序。微量元素：

# Character vector; assign names
vec <- letters[1:10]
names(vec) <- c(letters[20:11])

> vec
  t   s   r   q   p   o   n   m   l   k 
"a" "b" "c" "d" "e" "f" "g" "h" "i" "j" 

# This does not work
> sort(vec)
  t   s   r   q   p   o   n   m   l   k 
"a" "b" "c" "d" "e" "f" "g" "h" "i" "j" 

# Desired output
> vec
  k   l   m   n   o   p   q   r   s   t 
"j" "i" "h" "g" "f" "e" "d" "c" "b" "a" 

Answer 1

sort的：names​vec

vec[sort(names(vec))]
#  k   l   m   n   o   p   q   r   s   t 
#"j" "i" "h" "g" "f" "e" "d" "c" "b" "a" 

您还可以使用order：

vec[order(names(vec))]