multiple-arguments.md

# blog post?

my_mean <- function(x, ...) mean(x, na.rm = TRUE, ...)

vec <- c(1:5, NA, 5:1)

my_mean(vec)
#> [1] 3
my_mean(vec, na.rm = TRUE)
#> Error in mean.default(x, na.rm = TRUE, ...): formal argument "na.rm" matched by multiple actual arguments
mean(vec, na.rm = TRUE, na.rm = TRUE)
#> Error in mean.default(vec, na.rm = TRUE, na.rm = TRUE): formal argument "na.rm" matched by multiple actual arguments
mean(vec, na.rm = FALSE, na.rm = TRUE)
#> Error in mean.default(vec, na.rm = FALSE, na.rm = TRUE): formal argument "na.rm" matched by multiple actual arguments
mean(vec, na.rm = TRUE, na.rm = FALSE)
#> Error in mean.default(vec, na.rm = TRUE, na.rm = FALSE): formal argument "na.rm" matched by multiple actual arguments
mean(vec, na.rm = FALSE, na.rm = FALSE)
#> Error in mean.default(vec, na.rm = FALSE, na.rm = FALSE): formal argument "na.rm" matched by multiple actual arguments

my_mean2 <- function(x, na.rm = TRUE, ...) mean(x, na.rm = na.rm, ...)

my_mean2(vec)
#> [1] 3
my_mean2(vec, na.rm = TRUE)
#> [1] 3

^{Created on 2024-05-07 with reprex v2.1.0}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
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#>  date     2024-05-07
#>  pandoc   3.1.1 @ /Applications/RStudio.app/Contents/Resources/app/quarto/bin/tools/ (via rmarkdown)
#> 
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