python 用 matplotlib 的 matshow() 函数绘制矩阵

matplotlib 的 matshow() 函数用于绘制矩阵

示例1

import matplotlib.pyplot as plt import numpy as np mat = np.arange(0, 100).reshape(10, 10) plt.matshow(mat, cmap=plt.cm.Blues) plt.show()

 示例2：

import matplotlib.pyplot as plt import numpy as np mat = np.arange(0, 100).reshape(10, 10) plt.matshow(mat, cmap=plt.cm.gray) plt.show()

 

示例3：

import matplotlib.pyplot as plt import numpy as np mat = np.random.rand(10, 10) plt.matshow(mat, cmap=plt.cm.gray) plt.show()

示例4：

import matplotlib.pyplot as plt import numpy as np mat = np.array([[1,2]]) mat= np.repeat(np.tile(mat, 5), 5, axis=0) plt.matshow(mat, cmap=plt.cm.Blues) plt.show()

 示例5：

import matplotlib.pyplot as plt import numpy as np mat = np.arange(1, 10).reshape(3, 3) plt.matshow(mat, cmap=plt.cm.BrBG) for i in range(mat.shape[0]): for j in range(mat.shape[1]): plt.text(x=j, y=i, s=mat[i, j]) plt.show()