Python中的 Matplotlib.pyplot.tripcolor()
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。
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： _in_Python_0.png)
matplotlib.pyplot.tripcolor()函数
matplotlib 库的 pyplot 模块中的tripcolor()函数用于创建非结构化三角形网格的伪彩色图。
Syntax: matplotlib.pyplot.tripcolor(*args, alpha=1.0, norm=None, cmap=None, vmin=None, vmax=None, shading=’flat’, facecolors=None, **kwargs)
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.
- **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.tripcolor()函数：
示例 1：
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import matplotlib.tri as tri
import numpy as np
ang = 40
rad = 10
radm = 0.35
radii = np.linspace(radm, 0.95, rad)
angles = np.linspace(0, 1.5 * np.pi, ang)
angles = np.repeat(angles[..., np.newaxis], rad,
axis = 1)
angles[:, 1::2] += np.pi / ang
x = (radii * np.cos(angles)).flatten()
y = (radii * np.sin(angles)).flatten()
z = (np.sin(4 * radii) * np.cos(4 * angles)).flatten()
triang = tri.Triangulation(x, y)
triang.set_mask(np.hypot(x[triang.triangles].mean(axis = 1),
y[triang.triangles].mean(axis = 1))
< radm)
fig1, ax1 = plt.subplots()
ax1.set_aspect('equal')
tpc = ax1.tripcolor(triang, z, shading ='flat')
fig1.colorbar(tpc)
fig1.suptitle('matplotlib.pyplot.tripcolor() function\
Example\n\n', fontweight ="bold")
plt.show()
输出： _in_Python_1.jpg)
示例 2：
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import matplotlib.tri as tri
import numpy as np
xy = np.asarray([
[-0.057, 0.881], [-0.062, 0.876],
[-0.078, 0.876], [-0.087, 0.872],
[-0.030, 0.907], [-0.007, 0.905],
[-0.057, 0.916], [-0.025, 0.933],
[-0.045, 0.897], [-0.057, 0.895],
[-0.073, 0.900], [-0.087, 0.898],
[-0.090, 0.904], [-0.069, 0.907],
[-0.069, 0.921], [-0.080, 0.919],
[-0.073, 0.928], [-0.052, 0.930],
[-0.048, 0.942], [-0.062, 0.949],
[-0.054, 0.958], [-0.069, 0.954],
[-0.087, 0.952], [-0.087, 0.959],
[-0.080, 0.966], [-0.085, 0.973],
[-0.087, 0.965], [-0.097, 0.965],
[-0.097, 0.975], [-0.092, 0.984],
[-0.101, 0.980], [-0.108, 0.980],
[-0.104, 0.987], [-0.102, 0.993],
[-0.115, 1.001], [-0.099, 0.996],
[-0.101, 1.007], [-0.090, 1.010],
[-0.087, 1.021], [-0.069, 1.021],
[-0.052, 1.022], [-0.052, 1.017],
[-0.069, 1.010], [-0.064, 1.005],
[-0.048, 1.005], [-0.031, 1.005],
[-0.031, 0.996], [-0.040, 0.987],
[-0.045, 0.980], [-0.052, 0.975],
[-0.040, 0.973], [-0.026, 0.968],
[-0.020, 0.954], [-0.006, 0.947],
[ 0.003, 0.935], [ 0.006, 0.926],
[ 0.005, 0.921], [ 0.022, 0.923],
[ 0.033, 0.912], [ 0.029, 0.905],
[ 0.017, 0.900], [ 0.012, 0.895],
[ 0.027, 0.893], [ 0.019, 0.886],
[ 0.001, 0.883], [-0.012, 0.884],
[-0.029, 0.883], [-0.038, 0.879],
[-0.073, 0.928], [-0.052, 0.930],
[-0.048, 0.942], [-0.062, 0.949],
[-0.054, 0.958], [-0.069, 0.954],
[-0.087, 0.952], [-0.087, 0.959],
[-0.080, 0.966], [-0.085, 0.973],
[-0.087, 0.965], [-0.097, 0.965],
[-0.077, 0.990], [-0.059, 0.993]])
x, y = np.rad2deg(xy).T
triangles = np.asarray([[ 1, 66, 2], [64, 2, 65],
[63, 3, 64],[ 6, 5, 9],
[61, 68, 62], [69, 68, 61],
[ 9, 5, 70], [ 6, 8, 7],
[21, 24, 22], [17, 16, 45],
[20, 17, 45], [21, 25, 24],
[27, 26, 28], [20, 72, 21],
[25, 21, 72], [45, 72, 20],
[25, 28, 26], [44, 73, 45],
[72, 45, 73], [28, 25, 29],
[29, 25, 31], [43, 73, 44],
[73, 43, 40], [72, 73, 39],
[72, 31, 25], [42, 40, 43],
[31, 30, 29], [39, 73, 40],
[ 4, 70, 5], [ 8, 6, 9],
[56, 69, 57], [69, 56, 52],
[70, 10, 9], [54, 53, 55],
[56, 55, 53], [68, 70, 4],
[52, 56, 53], [11, 10, 12],
[69, 71, 68], [68, 13, 70],
[10, 70, 13], [51, 50, 52],
[13, 68, 71], [52, 71, 69],
[12, 10, 13], [71, 52, 50],
[71, 14, 13], [50, 49, 71],
[49, 48, 71], [14, 16, 15],
[14, 71, 48], [17, 19, 18],
[17, 20, 19], [48, 16, 14],
[48, 47, 16], [47, 46, 16],
[16, 46, 45], [23, 22, 24],
[42, 41, 40], [72, 33, 31],
[32, 31, 33], [39, 38, 72],
[33, 72, 38], [33, 38, 34],
[37, 35, 38], [34, 38, 35],
[35, 37, 36]])
xmid = x[triangles].mean(axis = 1)
ymid = y[triangles].mean(axis = 1)
x0 = -2
y0 = 20
zfaces = np.exp(-0.3 * ((xmid - x0) + (ymid - y0) ))
fig3, ax3 = plt.subplots()
ax3.set_aspect('equal')
tpc = ax3.tripcolor(x, y, triangles, facecolors = zfaces,
edgecolors ='k')
fig3.colorbar(tpc)
ax3.set_title('matplotlib.pyplot.tripcolor() Example')
plt.show()
输出： _in_Python_2.jpg)