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Python Bokeh - Plotting Patches on a Graph

Last Updated : 10 Jul, 2020
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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 patches on a graph. Plotting patches on a graph can be done using the patch() method of the plotting module.

plotting.figure.patch()

Syntax : patch(parameters) Parameters :
  • x : x-coordinates of the patch
  • y : y-coordinates of the patch
Returns : an object of class GlyphRenderer
Example 1 : In this example we will be using the default values for plotting the graph. Python3
# 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 Patch Graph") 
   
# the points to be plotted
x = [0, 1, 2, 3, 4, 5]
y = [5, 2, 8, 5, 0, 10]
    
# plotting the graph 
graph.patch(x, y) 
     
# displaying the model 
show(graph)
Output : Example 2 : In this example we will be plotting the patch with various other parameters Python3
# 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 Patch Graph") 

# name of the x-axis 
graph.xaxis.axis_label = "x-axis"
     
# name of the y-axis 
graph.yaxis.axis_label = "y-axis"

# points to be plotted
x = [0, 0, 1, 1, 4, 2, 8, 4]
y = [2.5, 0.5, 0.5, 2.5, 5, 9, 1, 0]

# color value of the patch
color = "yellow"

# fill alpha value of the patch
fill_alpha = 0.5

# name of the legend
legend_label = "Sample Patch"

# plotting the graph 
graph.patch(x, y,
            color = color,
            fill_alpha = fill_alpha,
            legend_label = legend_label) 
     
# displaying the model 
show(graph)
Output :

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