robustbase (version 0.7-6)

adjboxStats: Statistics for Skewness-adjusted Boxplots

Description

Computes the statistics for producing boxplots adjusted for skewed distributions as proposed in Hubert and Vandervieren (2004).

Usage

adjboxStats(x, coef = 1.5, a = -4, b = 3, do.conf = TRUE, do.out = TRUE)

Arguments

x

a numeric vector for which adjusted boxplot statistics are computed.

coef

number determining how far whiskers extend out from the box, see boxplot.stats.

a, b

scaling factors multiplied by the medcouple mc() to determine outlyer boundaries; see the references.

do.conf,do.out

logicals; if FALSE, the conf or out component respectively will be empty in the result.

Value

• A list with the components
• stats
  a matrix, each column contains the extreme of the lower whisker, the lower hinge, the median, the upper hinge and the extreme of the upper whisker for one group/plot. If all the inputs have the same class attribute, so will this component.
• n
  a vector with the number of observations in each group.
• coef
  a matrix where each column contains the lower and upper extremes of the notch.
• out
  the values of any data points which lie beyond the extremes of the whiskers.

See Also

adjbox(), also for references, the function which mainly uses this one; further boxplot.stats.

Examples

data(condroz)
astat <- adjboxStats(condroz[,"Ca"])
astat