letter_value {lettervalue}

Compute Letter Value.

Description

letter_value returns the letter values until the level indicated by level.

Usage

letter_value(x, level = 2, na_rm = TRUE)

Arguments

x

numeric vector

level

integer value between 2 and 9 indicating the level to compute the letter values. Default value is 2.

na_rm

a logical evaluating to TRUE or FALSE indicating whether NA values should be stripped before the computation proceeds. Default value is TRUE.

Details

This function computes the letter values as presented at Understanding Robust and Exploratory Data Analysis by Hoaglin, Mosteller and Tukey published in 1983.

Value

a list object is returned with the variable name (variable_name), the sample (sample), and a data frame with the following columns:

letter

a letter indicating the letter value

depth

depth of the letter value

lv_lower

lower letter value

lv_upper

upper letter value

Examples

letter_value(rivers)