Summarise a vector into the statistics a box plot needs

Computes the quartiles, Tukey-style whisker extents (the most extreme observations still within whisker_distance IQRs of the box), and the outliers lying beyond them. This is the server-side reduction that lets interactive_boxplot draw genuine box glyphs while sending only a handful of numbers per box to the browser rather than every observation.

Usage

box_summary(values, labels, whisker_distance = 1.5)

Arguments

values

Numeric vector

labels

Character vector of point labels, parallel to values

whisker_distance

IQR multiplier for the whiskers (see coef in geom_boxplot)

Value

A list with scalar q1, median, q3, lowerfence and upperfence, plus outlier_values and outlier_labels vectors