Python Bokeh – Plotting Rays 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 rays on a graph. Plotting rays on a graph can be done using the ray() method of the plotting module.

plotting.figure.ray()

Syntax : ray(parameters)

Parameters :

  • x : x-coordinates of the starting points of the rays
  • y : y-coordinates of the starting points of the rays
  • length : length of the ray
  • length_units : unit of the length of the rays

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 Rays Graph")
      
# the points to be plotted
x = 0
y = 0
  
# plotting the graph
graph.ray(x, y)
      
# displaying the model
show(graph)

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Output : 

Image


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











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# importing the modules 


from bokeh.plotting import figure, output_file, show 


from bokeh.palettes import magma 


import numpy 


  


# file to save the model 


output_file("gfg.html") 


        


# instantiating the figure object 


graph = figure(title = "Bokeh Rays 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] * 256


y = [0] * 256


  


# angles of the rays 


angle = numpy.linspace(0.00, 6.28, num = 256).tolist() 


  


# color of the rays 


color = magma(256) 


  


# plotting the graph 


graph.ray(x, y, 


          angle = angle, 


          color = color) 


      


# displaying the model 


show(graph) 



















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Output : 

Image





    

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