Python Bokeh – Plotting Patches 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 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.

# 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

# 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 :