Matplotlib.artist.artist.set_alpha()
Python matplotlib库的artist模块中的set_alpha()方法用于设置用于混合的alpha值。
语法:Artist.set_alpha(self, alpha)
参数:该方法接受以下参数。
- alpha:包含float值或None。
Returns:该方法不返回任何值。
下面的例子说明了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: