Python中的 Matplotlib.pyplot.ginput()

Matplotlib是Python中的一个库，它是 NumPy 库的数值数学扩展。 Pyplot是 Matplotlib 模块的基于状态的接口，它提供了一个类似 MATLAB 的接口。在 Pyplot 中可以使用各种图，包括线图、等高线图、直方图、散点图、3D 图等。

matplotlib.pyplot.table()函数

matplotlib 库的 ginput() 方法pyplot 模块用于阻止调用以与图形交互。

Syntax: matplotlib.pyplot.ginput(n=1, timeout=30, show_clicks=True, mouse_add=1, mouse_pop=3, mouse_stop=2)

Parameters: This method accept the following parameters that are described below:

• n : This parameter is the number of mouse clicks to accumulate.
• timeout : This parameter is the number of seconds to wait before timing out.
• show_clicks : This parameter is used to show a red cross at the location of each click.
• mouse_add : This parameter is the Mouse button used to add points.
• mouse_pop : This parameter is the Mouse button used to remove the most recently added point.
• mouse_stop : This parameter is the Mouse button used to stop input.

Returns: This method return the list of the clicked (x, y) coordinates.

下面的示例说明了 matplotlib.pyplot 中的 matplotlib.pyplot.ginput()函数：

示例 1：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
t = np.arange(10)
   
  
plt.plot(t, np.sin(t))
     
plt.title('matplotlib.pyplot.ginput()\
 function Example', fontweight ="bold")
   
print("After 3 clicks :")
x = plt.ginput(3)
print(x)
   
plt.show()

输出：

After 3 clicks :
[(4.460080645161289, 0.5915838985273842), 
(4.460080645161289, 0.5915838985273842), 
(4.460080645161289, 0.5915838985273842)]

示例 2：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
   
  
np.random.seed(10**7)
     
x1 = np.random.rand(103, 53) 
     
plt.title('matplotlib.pyplot.ginput() function\
 Example', fontweight ="bold")
   
print("After 2 clicks :")
plt.imshow(x1)
x = plt.ginput(2) 
print(x)
   
plt.show()

输出：

After 2 clicks :
[(8.443181818181813, 38.90530303030302), 
(8.443181818181813, 38.90530303030302)]