r rename columns

1# Rename column by name: change "beta" to "two"
2names(d)[names(d)=="beta"] <- "two"
3d
4#>   alpha two gamma
5#> 1     1   4     7
6#> 2     2   5     8
7#> 3     3   6     9
8
9# You can also rename by position, but this is a bit dangerous if your data
10# can change in the future. If there is a change in the number or positions of
11# columns, then this can result in wrong data.
12
13# Rename by index in names vector: change third item, "gamma", to "three"
14names(d)[3] <- "three"
15d
16#>   alpha two three
17#> 1     1   4     7
18#> 2     2   5     8
19#> 3     3   6     9
20

1# df = dataframe
2# old.var.name = The name you don't like anymore
3# new.var.name = The name you want to get
4
5names(df)[names(df) == 'old.var.name'] <- 'new.var.name'

1library(plyr)
2rename(d, c("beta"="two", "gamma"="three"))
3#>   alpha two three
4#> 1     1   4     7
5#> 2     2   5     8
6#> 3     3   6     9
7

1df <- rename(df, new_name = old_name) #For renaming dataframe column
2 
3tbl <- rename(tbl, new_name = old_name) #For renaming tibble column
4 
5tbl <- tbl %>% rename(new_name = old_name) #For renaming tibble column using dplyrpipe 
6                                           #operator 
7

1colnames(df)[which(names(df) == "columnName")] <- "newColumnName"

1df %>% rename(!!variable := name_of_col_from_df)
2