ggplot2 (version 0.9.1)

stat_ydensity: 1d kernel density estimate along y axis, for violin plot.

Description

1d kernel density estimate along y axis, for violin plot.

Usage

stat_ydensity(mapping = NULL, data = NULL,
    geom = "violin", position = "dodge", adjust = 1,
    kernel = "gaussian", trim = TRUE, scale = "equal",
    na.rm = FALSE, ...)

Arguments

trim

If TRUE (default), trim the tails of the violins to the range of the data. If FALSE, don't trim the tails.

scale

if "equal" (default), all violins have the same area (to be precise, they would have the same area if tails are not trimmed). If "count", the areas are scaled proportionally to the number of observations.

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

adjust

see density for details

kernel

kernel used for density estimation, see density for details

...

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 violin bounding box
• ydensity
  density estimate
• scaled
  density estimate, scaled depending on scalearea and scalecount
• count
  ydensity * number of points
• counttotal
  number of points

Examples

# See geom_violin for examples
# Also see stat_density for similar examples with data along x axis