- computers can't really generate random numbers.
- that is exactly what MATLAB is specified to do:
Why does MATLAB generate identical random values after re-opening the program?
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Rightia Rollmann
on 24 Jul 2018
I run the code below
y = rand(1,5)
and I get the following values:
0.8147 0.9058 0.1270 0.9134 0.6324
I close MATLAB and reopen it again and enter the same code and I get the same random values. Why does MATLAB create the exact same numbers each time?
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Accepted Answer
Rightia Rollmann
on 24 Jul 2018
2 Comments
Guillaume
on 24 Jul 2018
Follow the link in Stephen's comment to get the answer to your question, or do what Madhan told you.
Also, don't use the answer box for comments.
Stephen23
on 25 Jul 2018
Edited: Stephen23
on 25 Jul 2018
"I set rng to 'default', so I expected that it'll generate new random numbers after re-running MATLAB..."
The rng documentation explains that the 'default' option as "This way, the same random numbers are produced as if you restarted MATLAB. The default settings are the Mersenne Twister with seed 0." Clearly with the same seed it will generate exactly the same values each time. That is what it is specified to do!
More Answers (1)
madhan ravi
on 24 Jul 2018
Edited: madhan ravi
on 24 Jul 2018
hi, see the link below:
https://www.mathworks.com/help/matlab/ref/rng.html
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