Python中的 Matplotlib.axes.Axes.add_callback()
Matplotlib是Python中的一个库,它是 NumPy 库的数值数学扩展。 Axes 类包含大部分图形元素:Axis、Tick、Line2D、Text、Polygon 等,并设置坐标系。 Axes 的实例通过回调属性支持回调。
matplotlib.axes.Axes.add_callback() 方法
matplotlib 库的axes 模块中的add_callback() 方法用于获取每个绘图命令后是否重绘。
Syntax: Axes.add_callback(self, func)
Parameters: This method accepts the following parameters.
- func : This parameter is the callback function
Returns: This method returns the observer id associated with the callback.
以下示例说明了 matplotlib 中的 matplotlib.axes.Axes.add_callback()函数:
示例 1:
# Implementation of matplotlib function
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 = 50)
timer.add_callback(update)
timer.start()
fig, ax = plt.subplots()
start_animation()
ax.set_title('matplotlib.axes.Axes.add_callback() function\
Example', fontweight ="bold")
plt.show()
输出:
示例 2:
# Implementation of matplotlib function
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.axes.Axes.add_callback() \
function Example', fontweight ="bold")
plt.show()
输出: