Rename Columns of a Data Frame in R Programming – rename() Function

rename() function in R Language is used to rename the column names of a data frame, based on the older names.

Syntax: rename(x, names)

Parameters:
x: Data frame
names: Old name and new name

Example 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"))

Output:

[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

Example 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"))

Output:

  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