R rename column with replacements code example

Example 1: R rename singl edf column

colnames(trSamp)[2] <- "newname2"

Example 2: rename column in r

my_data %>% 
  rename(
    sepal_length = Sepal.Length,
    sepal_width = Sepal.Width
    )

Example 3: r rename column based on variable

df %>% rename(!!variable := name_of_col_from_df)