Python中的 Matplotlib.pyplot.tricontour()

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。

示例代码

# sample code
import matplotlib.pyplot as plt 
    
plt.plot([1, 2, 3, 4], [16, 4, 1, 8]) 
plt.show() 

输出：

matplotlib.pyplot.tricontour()函数

matplotlib 库的 pyplot 模块中的tricontour()函数用于在非结构化三角形网格上绘制轮廓。

Syntax:

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

• x, y: These parameter are the x and y coordinates of the data which is to be plot.
• triangulation: This parameter is a matplotlib.tri.Triangulation object.
• Z: This parameter is is the array of values to contour, one per point in the triangulation.
• **kwargs: This parameter is Text properties that is used to control the appearance of the labels.

All remaining args and kwargs are the same as for matplotlib.pyplot. pcolor().

Returns: This returns the list of 2 Line2D containing following:

• The lines plotted for triangles edges.
• The markers plotted for triangles nodes

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

示例 #1：

matplotlib.pyplot.tricontour(*args, **kwargs)

输出：

示例 #2：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import matplotlib.tri as mtri
import numpy as np
      
# Create triangulation.
x = np.asarray([0, 1, 2, 3, 0.5,
                1.5, 2.5, 1, 2, 1.5])
  
y = np.asarray([0, 0, 0, 0, 1.0, 
                1.0, 1.0, 2, 2, 3.0])
  
triangles = [[0, 1, 4], [1, 5, 4],
             [2, 6, 5], [4, 5, 7],
             [5, 6, 8], [5, 8, 7],
             [7, 8, 9], [1, 2, 5], 
             [2, 3, 6]]
  
triang = mtri.Triangulation(x, y, triangles)
z = np.cos(3 * x) * np.cos(6 * y)+np.sin(6 * x)
      
fig, axs = plt.subplots()
t = axs.tricontourf(triang, z)
axs.tricontour(triang, z, colors ='white')
fig.colorbar(t)
  
fig.suptitle('matplotlib.pyplot.tricontour() Example') 
plt.show()

输出：