R语言 重命名数据框的列 – rename()函数|极客教程

R语言中的 rename() 函数用于重命名数据框的列名，基于旧的名称。

语法： rename(x, names)

参数：

x： 数据框

names： 旧名称和新名称

例1 :

# R program to rename a Data Frame 
    
# Adding Package 
df <- library(plyr) 
    
# Creating a Data Frame 
df<-data.frame(row1 = 0:2, row2 = 3:5, row3 = 6:8) 
print("Original Data Frame") 
print(df) 
print("Modified Data Frame") 
    
# Renaming Data Frame 
rename(df, c("row1"="one", "row2"="two", "row3"="three")) 

R

输出

[1] "Original Data Frame"
  row1 row2 row3
1    0    3    6
2    1    4    7
3    2    5    8
[1] "Modified Data Frame"
  one two three
1   0   3     6
2   1   4     7
3   2   5     8

R

例2 :

# R program to modify names of a data frame
  
# Loading library
df <- library(plyr)
  
# Creating a data frame
df = data.frame( 
  "col1" = c("abc", "def", "ghi"), 
  "col2" = c("R", "Python", "Java"), 
  "col3" = c(22, 25, 45) 
) 
df
  
# Calling rename() function
rename(df, c("col1" = "Name", "col2" = "Language", "col3" = "Age"))

R

输出

  col1   col2 col3
1  abc      R   22
2  def Python   25
3  ghi   Java   45
  Name Language Age
1  abc        R  22
2  def   Python  25
3  ghi     Java  45