# plotnine.stats.stat_ydensity¶

class plotnine.stats.stat_ydensity(*args, **kwargs)[source]

Density estimate

Usage

stat_ydensity(mapping=None, data=None, geom='violin', position='dodge',
trim=True, **kwargs)


Only the mapping and data can be positional, the rest must be keyword arguments. **kwargs can be aesthetics (or parameters) used by the geom.

Parameters:
mapping : aes, optional

Aesthetic mappings created with aes(). If specified and inherit.aes=True, it is combined with the default mapping for the plot. You must supply mapping if there is no plot mapping.

Aesthetic Default value
x
y
weight None

The bold aesthetics are required.

Options for computed aesthetics

'width'  # Maximum width of density, [0, 1] range.


Calculated aesthetics are accessed using the calc function. e.g. 'stat(width)'.

data : dataframe, optional

The data to be displayed in this layer. If None, the data from from the ggplot() call is used. If specified, it overrides the data from the ggplot() call.

geom : str or stat, optional (default: violin)

The statistical transformation to use on the data for this layer. If it is a string, it must be the registered and known to Plotnine.

position : str or position, optional (default: dodge)

Position adjustment. If it is a string, it must be registered and known to Plotnine.

na_rm : bool, optional (default: False)

If False, removes missing values with a warning. If True silently removes missing values.

kernel : str, optional (default: 'gaussian')

Kernel used for density estimation. One of:

'biweight'
'cosine'
'cosine2'
'epanechnikov'
'gaussian'
'triangular'
'triweight'
'uniform'

adjust : float, optional (default: 1)

An adjustment factor for the bw. Bandwidth becomes bw * adjust. Adjustment of the bandwidth.

trim : bool, optional (default: False)

This parameter only matters if you are displaying multiple densities in one plot. If False, the default, each density is computed on the full range of the data. If True, each density is computed over the range of that group; this typically means the estimated x values will not line-up, and hence you won't be able to stack density values.

n : int, optional(default: 1024)

Number of equally spaced points at which the density is to be estimated. For efficient computation, it should be a power of two.

scale : (default: area)

How to scale the violins. The options are:

'area'   # all violins have the same area, before
# trimming the tails.

'count'  # areas are scaled proportionally to the number
# of observations.

'width'  # all violins have the same maximum width.