Tukey's letter value summaries

eda_lsum The letter value summary was introduced by John Tukey and extends the boxplot's 5 number summary by exploring the symmetry of the batch for depth levels other than the half (median) or the fourth (quartiles).

Usage

eda_lsum(x, l = 5, all = TRUE)

Arguments

x

Vector

l

Number of levels (max = 9)

all

Generate upper, lower and mid summaries if TRUE or just generate mid summaries if FALSE

Value

Returns a dataframe of letter value summaries.

Details

Outputs a data frame of letter value summaries.

References

Exploratory Data Analysis, John Tukey, 1973.

See also

https://mgimond.github.io/ES218/letter_values.html

Examples

x <- c(22, 8, 11, 3, 26, 1, 14, 18, 20, 25, 24)
eda_lsum(x)
#>   letter depth lower   mid upper spread
#> 1      M   6.0  18.0 18.00  18.0    0.0
#> 2      H   3.5   9.5 16.25  23.0   13.5
#> 3      E   2.0   3.0 14.00  25.0   22.0
#> 4      D   1.5   2.0 13.75  25.5   23.5
#> 5      C   1.0   1.0 13.50  26.0   25.0