Python numpy.matrix()用法及代碼示例

numpy.matrix(data，dtype = None)：
此類從數據字符串或array-like對象返回矩陣。獲得的矩陣是專門的2D數組。
參數：

data  : data needs to be array-like or string 
dtype : Data type of returned array. 
     

返回值：

data interpreted as a matrix

# Python Program illustrating 
# numpy.matrix class 
  
import numpy as geek 
  
# string input 
a = geek.matrix('1 2; 3 4') 
print("Via string input : \n", a, "\n\n") 
  
# array-like input 
b = geek.matrix([[5, 6, 7], [4, 6]]) 
print("Via array-like input : \n", b)

輸出：

Via string input : 
 [[1 2]
 [3 4]] 


Via array-like input : 
 [[[5, 6, 7] [4, 6]]]
 

參考文獻：
https://docs.scipy.org/doc/numpy/reference/generated/numpy.mat.html#numpy.mat