Python Bokeh – Plotting Wedges on a Graph

Bokeh is a Python interactive data visualization. It renders its plots using HTML and JavaScript. It targets modern web browsers for presentation providing elegant, concise construction of novel graphics with high-performance interactivity.

Bokeh can be used to plot wedges on a graph. Plotting wedges on a graph can be done using the wedge() method of the plotting module.

plotting.figure.wedge()

Syntax : wedge(parameters)

Parameters :

  • x : x-coordinates of the wedge markers
  • y : y-coordinates of the wedge markers
  • radius : radius of the wedge markers
  • radius_units : unit of the radius of the wedge markers, default is radian
  • start_angle : angle to start the wedge markers
  • start_angle_units : unit of the angle to start the wedge markers, default is radian
  • end_angle : angle to end the wedge markers
  • end_angle_units : unit of the angle to end the wedge markers
  • direction : direction of strokes, default is anticlock

Returns : an object of class GlyphRenderer



Example 1 : In this example we will be using the default values for plotting the graph.

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# importing the modules
from bokeh.plotting import figure, output_file, show
         
# file to save the model
output_file("gfg.html")
         
# instantiating the figure object
graph = figure(title = "Bokeh Wedge Graph")
       
# the points to be plotted
x = 0
y = 0
  
# radius of the wedge
radius = 15
  
# start angle of the wedge
start_angle = 1
  
# end angle of the wedge
end_angle = 2
  
# plotting the graph
graph.wedge(x, y,
            radius = radius,
            start_angle = start_angle,
            end_angle = end_angle)
       
# displaying the model
show(graph)

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Output :

Example 2 : In this example we will be plotting multiple wedges with various other parameters.

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# importing the modules
from bokeh.plotting import figure, output_file, show
         
# file to save the model
output_file("gfg.html")
         
# instantiating the figure object
graph = figure(title = "Bokeh Wedge Graph")
  
# name of the x-axis 
graph.xaxis.axis_label = "x-axis"
        
# name of the y-axis 
graph.yaxis.axis_label = "y-axis"
  
# the points to be plotted
x = [0, 5, 0]
y = [0, 5, 5]
  
# radius of the wedges
radius = [15, 10, 5]
  
# start angle of the wedges
start_angle = [1, 2, 3]
  
# end angle of the wedges
end_angle = [2, 4, 6]
  
# color value of the wedges
color = ["yellow", "red", "purple"]
   
# fill alpha value of the wedges
fill_alpha = [0.9, 0.7, 0.5]
  
# plotting the graph
graph.wedge(x, y,
            radius = radius,
            start_angle = start_angle,
            end_angle = end_angle,
            color = color,
            fill_alpha = fill_alpha)
       
# displaying the model
show(graph)

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Output :




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