This function will round p values according to the APA guideline. It will try to round to two decimals where possible, and will try to avoid printing the value of alpha, see Examples.
format_p_value(p, alpha = 0.05, prepend_p = FALSE)p value(s) to transform
the value of alpha, defaults to 0.05
a logical to indicate whether "p =" should be prepended to the result
A character
format_p_value(0.345678)
#> [1] "0.35"
format_p_value(0.05125)
#> [1] "0.051"
# this must not be "0.05", but is not "0.049" either,
# so it will add as many decimals as needed:
format_p_value(0.04993)
#> [1] "0.0499"
format_p_value(c(0.123, 0.00000001))
#> [1] "0.12" "< 0.001"
format_p_value(c(0.123, 0.00000001), prepend_p = TRUE)
#> [1] "p = 0.12" "p < 0.001"