randn() function generates the same sequence whenever I called it.
4 views (last 30 days)
Show older comments
JangHo Cho on 4 Aug 2015
Commented: JangHo Cho on 5 Aug 2015
I used MATLAB coder for converting .m files to C files.
All the things are O.K. except randn() function. The problem is that auto-generated randn() function generates the same sequence of numbers all the time. So I changed it by using 'srand(time(NULL))'; and 'rand/(double)RAND_MAX';
Are there any settings for MATLAB coder to generated a different version of randn() function?
Azzi Abdelmalek on 4 Aug 2015
Use rng function
More Answers (1)
Mike Hosea on 4 Aug 2015
Every time you start MATLAB it will deliver the same sequence if you don't provide your own seed first. Your generated code must match this behavior. Consequently, if that isn't what you want, you must use the rng function to seed the generator. There is an example here on MATLAB Answers somewhere that illustrates using the C time() function to with rng to seed the generator.
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!