What did they change to 'fread' on 2020a?
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Y. Li
am 19 Mai 2020
Beantwortet: Paul Dankoski
am 5 Feb. 2021
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/294594/image.png)
The left is 2020a, and the right is 2019a.
As the picture says, it takes significant longer time to execute and sometime it returns different resutls.
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 19 Mai 2020
File I/O functions, such as fscanf and fprintf, use automatic character set detection and UTF-8 encoding by default
Behavior change
As of R2020a, character-oriented file I/O functions such as fscanf, fgets, and fgetl trigger automatic character set detection when reading a file that was opened using fopen without a specified encoding.
Similarly, fprintf defaults to using UTF-8 encoding when writing a file that was opened using fopen without a specified encoding
You probably have a large file, and fread() is having to scan through a lot of the file to try to figure out what the character encoding is.
I would suggest that better code for you would be
beg4c = fread(fid, [1 4], 'uint8=>char');
Weitere Antworten (1)
Paul Dankoski
am 5 Feb. 2021
According to release notes, 2020a, Update 4 is also an option.
0 Kommentare
Siehe auch
Kategorien
Mehr zu Get Started with MATLAB finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!