Python中的 Matplotlib.axes.Axes.pcolor()

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.pcolor()函数

matplotlib 库的 axes 模块中的Axes.pcolor()函数也用于创建具有非规则矩形网格的伪彩色图

Syntax: Axes.pcolor(self, *args, alpha=None, norm=None, cmap=None, vmin=None, vmax=None, data=None, **kwargs)
pcolor([X, Y, ] C, **kwargs)

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

C : This parameter contains the values in 2D array which are to be color-mapped.
X, Y: These parameter are the coordinates of the quadrilateral corners.
cmap : This parameter is a colormap instance or registered colormap name.
norm : This parameter is the Normalize instance scales the data values to the canonical colormap range [0, 1] for mapping to colors
vmin, vmax : These parameter are optional in nature and they are colorbar range.
edgecolors : This parameter is a ccolor of the edges. {‘none’, None, ‘face’, color, color sequence}
alpha : This parameter is a intensity of the color.
snap : This parameter is used to snap the mesh to pixel boundaries.

Returns: This returns the collection.

编程需要懂一点英语

下面的示例说明了 matplotlib.axes 中的 matplotlib.axes.Axes.pcolor()函数：

示例 1：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.colors import LogNorm
  
Z = np.random.rand(6, 30)
  
fig, ax0 = plt.subplots()
  
ax0.pcolor(Z)
  
ax0.set_title('matplotlib.axes.Axes.pcolor() Examples')
plt.show()

输出：

示例 2：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.colors import LogNorm
  
Z = np.random.rand(16, 30)
  
fig, (ax0, ax1) = plt.subplots(2, 1)
  
c = ax0.pcolor(Z)
  
c = ax1.pcolor(Z, edgecolors ='k', linewidths = 1)
ax1.set_title('2.Example with edges')
  
ax0.set_title('matplotlib.axes.Axes.pcolor() \
Examples\n1.Example with no edges')
plt.show()

输出：