Matplotlib是Python中的一个库,它是数字的-NumPy库的数学扩展。它是Python中令人惊叹的可视化库,用于数组的2D图,并用于与更广泛的SciPy堆栈配合使用。
Matplotlib.axis.Axis.add_callback()函数
matplotlib库的axis模块中的Axis.add_callback()函数用于添加一个回调函数,只要Artist的一个属性发生更改,该函数就会被调用。
用法: Artist.add_callback(self, func)
参数:此方法接受以下参数。
- func:此参数是回调函数。
返回值:此方法返回与回调关联的观察者ID。
以下示例说明了matplotlib.axis中的matplotlib.axis.Axis.add_callback()函数:
范例1:
Python3
# Implementation of matplotlib function
from matplotlib.axis import Axis
import matplotlib.pyplot as plt
import numpy as np
import time
def update():
plt.get_current_fig_manager()\
.canvas.figure.patch.\
set_facecolor(str(np.random.random()))
plt.draw()
print("Draw at time:", time.time())
def start_animation():
timer = fig.canvas.new_timer(interval = 200)
timer.add_callback(update)
timer.start()
fig, ax = plt.subplots()
start_animation()
ax.set_title('matplotlib.axis.Axis.add_callback() \
function Example', fontweight ="bold")
plt.show()
输出:
范例2:
Python3
# Implementation of matplotlib function
from matplotlib.axis import Axis
from random import randint, choice
import time
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
back_color = "black"
colors = ['red', 'green', 'blue', 'purple']
width, height = 4, 4
fig, ax = plt.subplots()
ax.set(xlim =[0, width], ylim =[0, height])
fig.canvas.draw()
def update():
x = randint(0, width - 1)
y = randint(0, height - 1)
arti = mpatches.Rectangle(
(x, y), 1, 1,
facecolor = choice(colors),
edgecolor = back_color
)
ax.add_artist(arti)
ax.draw_artist(arti)
fig.canvas.blit(ax.bbox)
print("Draw at time:", time.time())
timer = fig.canvas.new_timer(interval = 1)
timer.add_callback(update)
timer.start()
ax.set_title('matplotlib.axis.Axis.add_callback() \
function Example', fontweight ="bold")
plt.show()
输出:
Draw at time:1591263025.354224 Draw at time:1591263025.4612164 Draw at time:1591263025.6232233 Draw at time:1591263025.748225 Draw at time:1591263025.8842134 ...... so on...
相关用法
注:本文由纯净天空筛选整理自SHUBHAMSINGH10大神的英文原创作品 Matplotlib.axis.Axis.add_callback() in Python。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。