x #> Error in eval(expr, envir, enclos): object 'x' not found x() #> Error in x(): could not find function "x"
x() #> Error in x(): could not find function "x" x #> Error in eval(expr, envir, enclos): object 'x' not found
c(Sys.Date(), factor("x"), "x") #> Warning in as.POSIXlt.Date(x): NAs introduced by coercion #> [1] "2018-12-19" "1970-01-02" NA