MATLAB: How to avoid duplicate random value when open multiple matlab session

MATLABrandomrandom number generator

Currently I need to open 10 diffierent matlab session simultaneously using a .bat file. In these 10 sessions, i need to generate random number uniformly distributed on the interval 0.25 to 0.5. From what I observe there were a lot of duplication of my random number from these 10 matlab session. My guess is that because they are open simultaneously using the bat file and my interval is quite short, the random seed somehow does not change much.

I am using the rand function to generate random real number

Please help me with this issue. Thank you !

Best Answer

add this in your code

seed = randi(2020);
rng(seed)

Related Solutions

MATLAB: How to generate same set of random numbers

You can control random number generation using 'rng()' function. The usage is rng(seed).

rng(seed) seeds the random number generator using the nonnegative integer seed so that rand, randi, and randn produce a predictable sequence of numbers.

Hope that helps..!!

MATLAB: Random Variable in Parallel Simulation

Here is an example to use different random seeds for each simulation

in(1:12) = Simulink.SimulationInput(mdlName);
for idx = 1:numWorkers
    in(idx) = in(idx).setPreSimFcn(@(x) PreSimFcnCallback(idx));
end
function PreSimFcnCallback(seed)
    rng(seed);
end

Please note that the example above is looping over 'numWorkers' the number of workers in the parallel pool, instead of the number of simulations, since it is sufficient to set the seed only once on each worker.

Best Answer

Related Solutions

MATLAB: How to generate same set of random numbers

MATLAB: Random Variable in Parallel Simulation

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