Matplotlib.artist.artist.get_alpha()
Python matplotlib库的artist模块中的get_alpha()方法用于获取用于混合的alpha值。
语法:Artist.get_alpha(self)
参数:该方法不接受任何参数。
返回:该方法返回用于混合的alpha值。
下面的例子说明了matplotlib中的matplotlib.artist.artist.get_alpha()函数:
示例1
# Implementation of matplotlib function
from matplotlib.artist import Artist
import matplotlib
import numpy as np
import matplotlib.pyplot as plt
np.random.seed(10**7)
mu = 121
sigma = 21
x = mu + sigma * np.random.randn(1000)
num_bins = 100
fig, ax = plt.subplots()
n, bins, patches = ax.hist(x, num_bins,
density = 1,
color ='green',
alpha = 0.7)
y = ((1 / (np.sqrt(2 * np.pi) * sigma)) *
np.exp(-0.5 * (1 / sigma * (bins - mu))**2))
ax.plot(bins, y, '--', color ='black')
ax.set_xlabel('X-Axis')
ax.set_ylabel('Y-Axis')
w = Artist.get_alpha(ax)
ax.set_title("Alpha Value : "+str(w))
fig.suptitle('matplotlib.artist.Artist.get_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
rx, ry = 3., 1.
value1 = rx * ry * np.pi
value2 = np.arange(0, 3 * np.pi + 0.01, 0.2)
value3 = np.column_stack([rx / value1 * np.cos(value2),
ry / value1 * np.sin(value2)])
x, y, s, c = np.random.rand(4, 99)
s *= 10**2.
fig, ax = plt.subplots()
ax.scatter(x, y, s, c, marker = value3)
Artist.set_alpha(ax, 0.5)
w = Artist.get_alpha(ax)
ax.set_title("Alpha Value : "+str(w))
fig.suptitle('matplotlib.artist.Artist.get_alpha()\
function Example', fontweight ="bold")
plt.show()
输出: