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rdplyr

Renaming a dataframe with a string variable

I have below code

library(dplyr)

New_Col_Name = 'Some_Name'
dat = data.frame('a' = 3)
dat %>% rename(a = New_Col_Name)

Basically, I am trying to rename with a dynamic variable New_Col_Name.

ABove code generates an error. Could you please help to correctly write above code?

Solution

  • rename() expects its arguments the other way round, exactly like regular assignment.

    And if you want to use a dynamic name, you cannot just say rename(new = old), since that will attempt to use the variable name literally (i.e. it will create a column called new). To use a computed/dynamic name, you need to use tidy evaluation with the := operator and interpolation:

    dat %>% rename(!! New_Col_Name := a)