python 笔记：读取mat文件

Posted 2022-04-04 UQI-LIUWJ

1 mat文件介绍

mat文件是matlab的数据存储的标准格式。

        mat文件是标准的二进制文件,还可以ASCII码形式保存和加载，在MATLAB中打开显示类似于单行EXCEL表格。

——from 百度百科

2 python读取mat文件

使用scipy包

比如我们路径上有一个tensor.mat的文件（来自数据集Urban Traffic Speed Dataset of Guangzhou, China | Zenodo）

from scipy.io import loadmat

a=loadmat('tensor.mat')
a

'''
'__header__': b'MATLAB 5.0 MAT-file, Platform: PCWIN64, Created on: Wed Mar 08 20:19:02 2017',
 '__version__': '1.0',
 '__globals__': [],
 'tensor': array([[[40.893, 41.938, 44.098, ..., 42.349, 43.062, 43.246],
         [41.227, 45.891, 42.333, ..., 42.15 , 39.34 , 40.87 ],
         [42.68 , 41.52 , 42.068, ..., 41.977, 43.372, 41.841],
         ...,
         [42.993, 41.824, 40.173, ..., 42.92 , 40.504, 42.006],
         [41.685, 41.996, 40.779, ..., 39.97 , 40.647, 36.771],
         [39.543, 41.001, 40.341, ..., 39.242, 39.726, 39.089]], 
   
 
        ...,
 
        [[51.88 , 50.378, 52.041, ..., 50.619, 48.85 , 51.191],
         [52.075, 54.167, 50.814, ..., 48.619, 43.985, 46.663],
         [51.066, 48.728, 49.656, ..., 52.113, 50.615, 53.061],
         ...,
         [50.057, 50.279, 49.887, ..., 51.979, 51.141, 51.116],
         [51.418, 52.297, 51.818, ..., 48.772, 51.622, 51.566],
         [51.226, 49.731, 51.082, ..., 51.266, 51.352, 52.402]]])
'''

可以看到输出来的是一个字典类型的文件