怎么可能重命名 R 中的一批列名，只更改一个数字，使名称的 rest 保持不变？

Question

I have data from one survey with 30 items collected over two waves (ie, time points). Items are labeled as follows: item1w1, item2w1, item3w1, etc., where w1 = wave 1. How can I rename all items by only changing the w1 to w2, leaving the rest of the item name the same as the original, without changing each item individually, as with dplyr::rename or some other method?

That is, item1 w1 = item1 w2 , item2 w1 = item2 w2 , etc.

Answer 1

Using base R

names(df) <- sub("w1$", "w2", names(df))

Answer 2

You can use rename_with :

library(dplyr)
rename_with(your_dataframe, ~ gsub("w1", "w2", .x), ends_with("w1"))
#alternative:
#rename_with(your_dataframe, ~ gsub("w1$", "w2", .x))