tukey_mc_up {bigutilsr}  R Documentation 
Outlier detection threshold (upper) based on Tukey's rule, corrected for skewness using the 'medcouple', and possibly corrected for multiple testing.
tukey_mc_up(x, coef = NULL, alpha = 0.05, a = 4, b = 3)
x 
Numeric vector. Should be somewhat normally distributed. 
coef 
number determining how far 'whiskers' extend out from the box.
If 
alpha 
See 
a 
scaling factors multiplied by the medcouple

b 
scaling factors multiplied by the medcouple

Hubert, M. and Vandervieren, E. (2008). An adjusted boxplot for skewed distributions, Computational Statistics and Data Analysis 52, 5186–5201.
hist(x < c(rnorm(3, m = 6), rnorm(1e4, m = 0))) (q < tukey_mc_up(x)) abline(v = q, col = "red") which(x > q)