This function identifies outliers in a numeric variable of a data.frame using the interquartile range (IQR) method.
Value
A data.frame containing the outliers in variable_name.
If no outliers are found, the function returns NULL. The
function also prints diagnostic information about the
variable and the number of outliers found.
Examples
data(mtcars)
find_outliers(mtcars, mpg)
#> Variable name: mpg
#> Q1: 15.425 Q3: 22.8 IQR: 7.375
#> Upper fence: 33.8625 Lower fence: 4.3625
#> Number of outliers: 1
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Toyota Corolla 33.9 4 71.1 65 4.22 1.835 19.9 1 1 4 1
find_outliers(mtcars, wt)
#> Variable name: wt
#> Q1: 2.58125 Q3: 3.61 IQR: 1.02875
#> Upper fence: 5.153125 Lower fence: 1.038125
#> Number of outliers: 3
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Cadillac Fleetwood 10.4 8 472 205 2.93 5.250 17.98 0 0 3 4
#> Lincoln Continental 10.4 8 460 215 3.00 5.424 17.82 0 0 3 4
#> Chrysler Imperial 14.7 8 440 230 3.23 5.345 17.42 0 0 3 4