Is it possible to generate specific random numbers?

seedvalue = 0;
expected = [89 70 10 12 67 25 200 18 90 86];
rng(seedvalue, 'twister');
actual = randperm(max(expected), numel(expected));
while ~isequal(actual, expected)
    seedvalue = seedvalue + 1;
    rng(seedvalue, 'twister');
    actual = randperm(max(expected), numel(expected));
end

It may take a while. This assumes you haven't manually created a state vector (which would be an advanced maneuver.)

If you're asking if there's a clever way to directly go from the sequence to the seed value, I'm not aware of any offhand.

If you know you're going to need or want to reproduce a given sequence, record the seed before generating the sequence.

2 个评论
显示无隐藏无

Omar Ali Muhammed 2021-5-3

However, Speed is the main challenge espicially for long sequence. Is it possible to parallelize the code?

Steven Lord 2021-5-3

Yes, this code could be parallelized through the use of parfor to sweep the seed space. But if speed is of the essence the best solution is to record the seed before you generate the sequence rather than trying to determine the seed after the fact.

请先登录，再进行评论。