ggplot2 (version 0.9.0)

stat_boxplot: Calculate components of box and whisker plot.

Description

Calculate components of box and whisker plot.

Usage

stat_boxplot(mapping = NULL, data = NULL,
    geom = "boxplot", position = "dodge", na.rm = FALSE,
    coef = 1.5, ...)

Arguments

coef

length of the whiskers as multiple of IQR. Defaults to 1.5

na.rm

If FALSE (the default), removes missing values with a warning. If TRUE silently removes missing values.

mapping

The aesthetic mapping, usually constructed with aes or aes_string. Only needs to be set at the layer level if you are overriding the plot defaults.

data

A layer specific dataset - only needed if you want to override the plot defaults.

geom

The geometric object to use display the data

position

The position adjustment to use for overlappling points on this layer

...

other arguments passed on to layer. This can include aesthetics whose values you want to set, not map. See layer for more details.

Value

• A data frame with additional columns:
• width
  width of boxplot
• ymin
  lower whisker = smallest observation greater than or equal to lower hinge - 1.5 * IQR
• lower
  lower hinge, 25% quantile
• notchlower
  lower edge of notch = median - 1.58 * IQR / sqrt(n)
• middle
  median, 50% quantile
• notchupper
  upper edge of notch = median + 1.58 * IQR / sqrt(n)
• upper
  upper hinge, 75% quantile
• ymax
  upper whisker = largest observation less than or equal to upper hinge + 1.5 * IQR

Examples

# See geom_boxplot for examples