bokeh.plotting.figure.annular_wedge() function in Python

Bokeh is a data visualization library in Python that provides high-performance interactive charts and plots and the output can be obtained in various mediums like notebook, html and server. The Figure Class create a new Figure for plotting. It is a subclass of Plot that simplifies plot creation with default axes, grids, tools, etc.

bokeh.plotting.figure.annular_wedge() Function

The annular_wedge() function in plotting module of bokeh library is used to add AnnularWedge glyphs to a Figure.

Syntax: annular_wedge(x, y, inner_radius, outer_radius, start_angle, end_angle, direction=’anticlock’, *, end_angle_units=’rad’, fill_alpha=1.0, fill_color=’gray’, inner_radius_units=’data’, line_alpha=1.0, line_cap=’butt’, line_color=’black’, line_dash=[], line_dash_offset=0, line_join=’bevel’, line_width=1, name=None, outer_radius_units=’data’, start_angle_units=’rad’, tags=[], **kwargs)

Parameters: This method accept the following parameters that are described below:

• x: This parameter is the x-coordinates for the center of the annular wedges.
• y: This parameter is the y-coordinates for the center of the annular wedges.
• inner_radius: This parameter is the inner radii of the annular wedges.
• outer_radius: This parameter is the outer radii of the annular wedges.
• start_angle: This parameter is the angles to start the annular wedges.
• end_angle: This parameter is the angles to end the annular wedges.
• direction: This parameter is the direction to stroke between the start and end angles.
• fill_alpha: This parameter is the fill alpha values for the annular wedges.
• fill_color: This parameter is the fill color values for the annular wedges.
• line_alpha: This parameter is the line alpha values for the annular wedges with default value of 1.0 .
• line_cap: This parameter is the line cap values for the annular wedges with default value of butt.
• line_color: This parameter is the line color values for the annular wedges with default value of black.
• line_dash: This parameter is the line dash values for the annular wedges with default value of [].
• line_dash_offset: This parameter is the line dash offset values for the annular wedges with default value of 0.
• line_join: This parameter is the line join values for the annular wedges with default value of bevel.
• line_width: This parameter is the line width values for the annular wedges with default value of 1.
• mode: This parameter can be one of three values : [“before”, “after”, “center”].
• name: This parameter is the user-supplied name for this model.
• tags: This parameter is the user-supplied values for this model.

Other Parameters: These parameters are **kwargs that are described below:

• alpha: This parameter is used to set all alpha keyword arguments at once.
• color: This parameter is used to to set all color keyword arguments at once.
• legend_field: This parameter is the name of a column in the data source that should be used or the grouping.
• legend_group: This parameter is the name of a column in the data source that should be used or the grouping.
• legend_label: This parameter is the legend entry is labeled with exactly the text supplied here.
• muted: This parameter contains the bool value.
• name: This parameter is the optional user-supplied name to attach to the renderer.
• source: This parameter is the user-supplied data source.
• view: This parameter is the view for filtering the data source.
• visible: This parameter contains the bool value.
• x_range_name: This parameter is the name of an extra range to use for mapping x-coordinates.
• y_range_name: This parameter is the name of an extra range to use for mapping y-coordinates.
• level: This parameter specify the render level order for this glyph.

Return: This method return the GlyphRenderer value.

Below examples illustrate the bokeh.plotting.figure.annular_wedge() function in bokeh.plotting:
Example 1:

# Implementation of bokeh function

import numpy as np
from bokeh.plotting import figure, output_file, show

x = [2]
y = [2]
r = .6

plot = figure(width = 300, height = 300)
plot.annular_wedge(x = x, y = y, inner_radius =.2,
                   outer_radius = r, start_angle = 0,
                   end_angle = 6.5, line_color = "red",
                   fill_color ="red")

show(plot)

Output:

Example 2:

# Implementation of bokeh function

import numpy as np
from bokeh.plotting import figure, output_file, show

N = 9
x = np.linspace(-2, 2, N)
y = x**2
r = x / 12.0 + 0.4

plot = figure(width = 300, height = 300)
plot.annular_wedge(x = x, y = y, inner_radius =.2,
                   outer_radius = r, start_angle = 0.6,
                   end_angle = 4.1, fill_color ="green")

show(plot)

Output: