read file variables methods
3 次查看(过去 30 天)
显示 更早的评论
I got a large data matrix (3Gb) of signal data which I saved to a .mat file. Since the data size is large I figured out it will be wiser to access the file and read each time a block of data, process it and move to the next block instead of loading the complete file. I'm wondering should I use the matfile method, fopen and fread or should I use a datastore and read command. What is faster from the processing point of view and easier to work with? Or any other considerations? Thanks
3 个评论
per isakson
2016-11-14
Given
- "large data matrix (3Gb) of signal data which I saved to a .mat file"
- "Total RAM size - 3G[B]"
- "[one] plain numerical array 10 million lines by 48 columns"
I assume the mat-file is version 7.3, because that's needed to store an array of that size.
I would say this a a perfect case for matfile, Access and change variables directly in MAT-files, without loading into memory.
It's the easiest to work with and I don't think there is any other way that is significantly faster.
回答(1 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Workspace Variables and MAT-Files 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!