Matplotlib.axes.Axes.set_gid() in Python

Last Updated : 30 Apr, 2020

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.set_gid() Function

The Axes.set_gid() function in axes module of matplotlib library is used to set the (group) id for the artist.

Syntax: Axes.set_gid(self, gid) Parameters: This method accepts only one parameters.

gid: This parameter is the string given as gid.

Returns: This method does not return any value.

Below examples illustrate the matplotlib.axes.Axes.set_gid() function in matplotlib.axes: Example 1:

Python3

# Implementation of matplotlib function
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')

for i, t in enumerate(ax.patches):
    t.set_gid('patch_% d' % i)
 
fig.suptitle('matplotlib.axes.Axes.set_gid() \
function Example\n\n', fontweight ="bold")

plt.show()

Output:

Example 2:

Python3

# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt

 
fig, ax = plt.subplots()

circle = plt.Circle((0, 0), 5, fc ='blue')
rect = plt.Rectangle((-5, 10), 10, 5, fc ='green')

ax.add_patch(circle)
ax.add_patch(rect)

circle_tip = ax.annotate('This is a blue circle.',
            xy =(0, 0),
            xytext =(30, -30),
            textcoords ='offset points',
            color ='w',
            ha ='left',
            bbox = dict(boxstyle ='round, pad =.5', 
                        fc =(.1, .1, .1, .92),
                        ec =(1., 1., 1.), 
                        lw = 1,
                        zorder = 1),
            )

rect_tip = ax.annotate('This is a green rectangle.',
            xy =(-5, 10),
            xytext =(30, 40),
            textcoords ='offset points',
            color ='w',
            ha ='left',
            bbox = dict(boxstyle ='round, pad =.5',
                        fc =(.1, .1, .1, .92), 
                        ec =(1., 1., 1.), 
                        lw = 1,
                        zorder = 1),
            )

for i, t in enumerate(ax.patches):
    t.set_gid('patch_% d'% i)

for i, t in enumerate(ax.texts):
    t.set_gid('tooltip_% d'% i)

ax.set_xlim(-30, 30)
ax.set_ylim(-30, 30)
ax.set_aspect('equal')
 
fig.suptitle('matplotlib.axes.Axes.set_gid() function \
Example\n\n', fontweight ="bold")

plt.show()