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

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.

[Adam Danz]

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]

@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."

Answer 1

[Adam Danz]

"For this I need to stop rng 'default ' command. Can anybody tell me how to do this? "

rng('shuffle')

will re-seed the random number generator based on the current time.

https://www.mathworks.com/help/matlab/ref/rng.html#d117e1259353

For more info:

https://www.mathworks.com/help/matlab/math/why-do-random-numbers-repeat-after-startup.html