Matplotlib.axes.Axes.add_patch() in Python
Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. The Axes Class contains most of the figure elements: Axis, Tick, Line2D, Text, Polygon, etc., and sets the coordinate system. And the instances of Axes supports callbacks through a callbacks attribute.
matplotlib.axes.Axes.add_patch() Function
The Axes.add_patch() function in axes module of matplotlib library is used to add a Patch to the axes’ patches; return the patch.
Syntax: Axes.add_patch(self, p)
Parameters: This method accepts the following parameters.
- line: This parameter is the Patch to the axes’ patches.
Return value: This method returns the Patch .
Below examples illustrate the matplotlib.axes.Axes.add_patch() function in matplotlib.axes:
Example 1:
import numpy as np
import matplotlib.pyplot as plt
y, x = np.mgrid[: 5 , 1 : 6 ]
poly_coords = [
( 0.25 , 2.75 ), ( 3.25 , 2.75 ),
( 2.25 , 0.75 ), ( 0.25 , 0.75 )
]
fig, ax = plt.subplots()
cells = ax.plot(x, y, x + y, color = 'green' )
ax.add_patch(
plt.Polygon(poly_coords, color = 'forestgreen' ,
alpha = 0.5 )
)
ax.margins(x = 0.1 , y = 0.05 )
ax.set_aspect( 'equal' )
fig.suptitle('matplotlib.axes.Axes.add_patch() \
function Example\n\n', fontweight = "bold" )
plt.show()
|
Output:
Example 2:
import matplotlib.path as mpath
import matplotlib.patches as mpatches
import matplotlib.pyplot as plt
Path = mpath.Path
fig, ax = plt.subplots()
pp1 = mpatches.PathPatch(
Path([( 0 , 0 ), ( 1 , 0 ), ( 1 , 1 ), ( 0 , 0 )],
[Path.MOVETO, Path.CURVE3,
Path.CURVE3, Path.CLOSEPOLY]),
fc = "none" , transform = ax.transData)
ax.add_patch(pp1)
ax.plot([ 0.75 ], [ 0.25 ], "go-" )
fig.suptitle('matplotlib.axes.Axes.add_patch() \
function Example\n\n', fontweight = "bold" )
plt.show()
|
Output:
Last Updated :
21 Apr, 2020
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