how to close rng 'default' after using it once in a same program

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RAJ DATTA 2019-9-23

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https://ww2.mathworks.cn/matlabcentral/answers/481694-how-to-close-rng-default-after-using-it-once-in-a-same-program

评论： Adam Danz 2019-10-1

Suppose, there is a scenario where I am using random number generator(rand(n,1)) which I need to fix for the values of a variable for a loop. So, I am using the command rng 'default'. Again in the same program I need to vary the random numbers in some other loops. But for For this I need to stop rng 'default ' command. Can anybody tell me how to do this?

Thanks in advance.

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Adam Danz 2019-9-23

编辑：Adam Danz 2019-9-24

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I don't recommend setting rng('default') within a loop, if that's what you're doing. That defeats the purpose of using a random process since every iteration would have the same sequence of random numbers. If you need to keep track of the random number generator seed for each iteration of a loop, you can store it like this.

n = 5
rngState = []; 
for i = 1:n
    rngState = [rngState; rng()]; 
    % Your code here
end
seeds = [rngState.Seed]

Adam Danz 2019-10-1

@RAJ DATTA, if you was rng('shuffle') not the answer you were looking for? Maybe there's a different interpreptation of "For this I need to stop rng 'default ' command."

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