Python Bokeh – Plotting Rays on a Graph

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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.

# 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) 

Output :

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

# 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) 