3 messages · Hadley Wickham, Davor Cubranic
Is there any easy way to tell if a string is a syntactically valid name?
[...]
One implementation would be: is.syntactic <- function(x) x == make.names(x) but I wonder if there's a more elegant way.
This is without quoting, right? Because "make.names" replaces spaces with
periods, and using quoting I can create syntactically valid names that do
include spaces:
`x prime` <- 3
ls()
Davor
This is without quoting, right? Because "make.names" replaces spaces with periods, and using quoting I can create syntactically valid names that do include spaces: ? ?`x prime` <- 3 ? ?ls()
That's not a syntactically valid name - you use backticks to refer to names that are not syntactically valid. Hadley
Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/
That's not a syntactically valid name - you use backticks to refer to names that are not syntactically valid.
I was too loose in my terminology: I meant that `x prime` is a valid name, but as you said, it is not syntactically valid. Davor