Aliases: sym syms data_sym data_syms
Keywords:
### ** Examples # Create a symbol sym("cyl")
cyl
# Create a list of symbols syms(c("cyl", "am"))
[[1]] cyl [[2]] am
# Symbolised names refer to variables eval(sym("cyl"), mtcars)
[1] 6 6 4 6 8 6 8 4 4 6 6 8 8 8 8 8 8 4 4 4 4 8 8 8 8 4 4 4 8 6 8 4
# Beware of scoping issues Cyl <- "wrong" eval(sym("Cyl"), mtcars)
[1] "wrong"
# Data symbols are explicitly scoped in the data mask try(eval_tidy(data_sym("Cyl"), mtcars))
Error in .data$Cyl : Column `Cyl` not found in `.data`.
# These can only be used with tidy eval functions try(eval(data_sym("Cyl"), mtcars))
Error in eval(data_sym("Cyl"), mtcars) :
Can't subset `.data` outside of a data mask context.
# The empty string returns the missing argument: sym("")
# This way sym() and as_string() are inverse of each other: as_string(missing_arg())
[1] ""
sym(as_string(missing_arg()))