Python中的 Matplotlib.artist.Artist.set_alpha()
Matplotlib是Python中的一个库,它是 NumPy 库的数值数学扩展。 Artist 类包含呈现为 FigureCanvas 的对象的 Abstract 基类。图中所有可见元素都是 Artist 的子类。
matplotlib.artist.Artist.set_alpha() 方法
matplotlib 库的艺术家模块中的set_alpha() 方法用于设置用于混合的 alpha 值。
Syntax: Artist.set_alpha(self, alpha)
Parameters: This method accepts the following parameters.
- alpha: This parameter is the contains float value or None.
Returns: This method does not return any value.
下面的示例说明了 matplotlib 中的 matplotlib.artist.Artist.set_alpha()函数:
示例 1:
# Implementation of matplotlib function
from matplotlib.artist import Artist
import matplotlib.pyplot as plt
import numpy as np
# create test data
np.random.seed(10**7)
data = [sorted(np.random.normal(0, std, 100))
for std in range(1, 5)]
fig, ax1 = plt.subplots()
val = ax1.violinplot(data)
ax1.set_ylabel('Result')
ax1.set_xlabel('Domain Name')
for i in val['bodies']:
i.set_facecolor('green')
Artist.set_alpha(i, 0.5)
fig.suptitle('matplotlib.artist.Artist.set_alpha()\
function Example', fontweight ="bold")
plt.show()
输出:
示例 2:
# Implementation of matplotlib function
from matplotlib.artist import Artist
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.patches import Ellipse
NUM = 200
ells = [Ellipse(xy = np.random.rand(2) * 10,
width = np.random.rand(),
height = np.random.rand(),
angle = np.random.rand() * 360)
for i in range(NUM)]
fig, ax = plt.subplots(subplot_kw ={'aspect': 'equal'})
for e in ells:
ax.add_artist(e)
e.set_clip_box(ax.bbox)
Artist.set_alpha(e, np.random.rand())
e.set_facecolor(np.random.rand(4))
ax.set_xlim(3, 7)
ax.set_ylim(3, 7)
fig.suptitle('matplotlib.artist.Artist.set_alpha()\
function Example', fontweight ="bold")
plt.show()
输出: