Apparently, any function whose name appears as a column name of a tibble cannot be used within across() even when it is specified as the .fns argument:
library(dplyr) # column called "mean" tibble(mean = 1:5) %>% summarize(across(.fns = mean)) #> Error in `summarize()`: #> ! Problem while computing `..1 = across(.fns = mean)`. #> Caused by error: #> ! attempt to select less than one element in integerOneIndex #> Backtrace: #> ▆ #> 1. ├─tibble(mean = 1:5) %>% summarize(across(.fns = mean)) #> 2. ├─dplyr::summarize(., across(.fns = mean)) #> 3. ├─dplyr:::summarise.data.frame(., across(.fns = mean)) #> 4. │ └─dplyr:::summarise_cols(.data, dplyr_quosures(...), caller_env = caller_env()) #> 5. │ ├─base::withCallingHandlers(...) #> 6. │ └─dplyr:::expand_across(dots[[i]]) #> 7. │ ├─dplyr:::across_setup(...) #> 8. │ └─rlang::eval_tidy(expr$.fns, mask, env = env) #> 9. ├─`<fn>`() #> 10. └─base::.handleSimpleError(...) #> 11. └─dplyr (local) h(simpleError(msg, call)) #> 12. └─rlang::abort(bullets, call = error_call, parent = skip_internal_condition(e)) # column called "average" tibble(average = 1:5) %>% summarize(across(.fns = mean)) #> # A tibble: 1 × 1 #> average #> <dbl> #> 1 3
Created on 2022-11-17 with reprex v2.0.2
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