Flag outliers by IQR

Flag outliers based on the interquartile range

Usage

outliers_by_iqr(x, threshold = 1.5, direction = c("both", "low", "high"))

Arguments

x

numeric vector

threshold

threshold for the upper and lower limits, A.K.A. Tukey's fences

direction

return TRUE if the value is above or below the outlier cutoff. default "both", samples above and below the threshold are called outliers.

Value

boolean vector indicating which values of the input vector are flagged as outliers

Examples

x <- c(1, 1, 2, 2, 4, 6, 11)

outliers_by_iqr(x)
#> [1] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE

# Using direction="low" disregards outliers above threshold, for example
outliers_by_iqr(x, direction="low")
#> [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE