How to rename variables in a data frame using R?

In R language, you can rename variables in a data frame using the names() function or the colnames() function. Here are examples of both methods:

1. What are the names?

# 创建一个示例数据框
df <- data.frame(A = 1:3, B = 4:6)

# 对变量进行重命名
names(df)[1] <- "New_A"  # 将第一个变量名修改为"New_A"
names(df)[2] <- "New_B"  # 将第二个变量名修改为"New_B"

# 查看修改后的数据框
df

1. The function colnames()

# 创建一个示例数据框
df <- data.frame(A = 1:3, B = 4:6)

# 对变量进行重命名
colnames(df)[1] <- "New_A"  # 将第一个变量名修改为"New_A"
colnames(df)[2] <- "New_B"  # 将第二个变量名修改为"New_B"

# 查看修改后的数据框
df

You can choose either method to rename the variables in the data frame.