programmatically rename columns in dplyr
To programatically setting variable you need to use special operator :=
and !!
to evaluate your variable.
See dplyr's vignette Programming with dplyr
cnames=c('cylinder', 'mile_per_gallon')
library(dplyr, warn.conflicts = F)
mtcars %>%
as_tibble() %>%
rename(!!cnames[1] := cyl)
#> # A tibble: 32 x 11
#> mpg cylinder disp hp drat wt qsec vs am gear carb
#> * <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4
#> 2 21 6 160 110 3.9 2.88 17.0 0 1 4 4
#> 3 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1
#> 4 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1
#> 5 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2
#> 6 18.1 6 225 105 2.76 3.46 20.2 1 0 3 1
#> 7 14.3 8 360 245 3.21 3.57 15.8 0 0 3 4
#> 8 24.4 4 147. 62 3.69 3.19 20 1 0 4 2
#> 9 22.8 4 141. 95 3.92 3.15 22.9 1 0 4 2
#> 10 19.2 6 168. 123 3.92 3.44 18.3 1 0 4 4
#> # ... with 22 more rows
The simplest solution currently to programmatically rename in dplyr is to use the tripple bang (!!!)
library(dplyr)
cnames = c('cylinder' = 'cyl', 'mile_per_gallon' = 'mpg')
mtcars %>% rename(!!!cnames)