Mersenne Twister RNG init_by_array

2017 6 20
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更新时间：2017 6 28
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Jan
Jan 2017-6-20
编辑：Jan 2017-6-20

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No, this is not possible in Matlab. As far as I know, you can seed it with 32 bits only - but I'm still such surprised about this, that I hope I've overseen a detail.
See https://mathworks.com/matlabcentral/answers/329848-how-to-get-non-repeatable-randn-results

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Noam Mazor
Noam Mazor 2017-6-22
Thanks! Is there a simple way to use the C implementation as an external lib and to initialize it from there?

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Peter Perkins
Peter Perkins 2017-6-28

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The "array" you are talking about is typically a state vector, right? You can set the generator state:
>> r = RandStream.getGlobalStream
r =
mt19937ar random stream (current global stream)
Seed: 0
NormalTransform: Ziggurat
>> s = r.State;
>> rand(1,5)
ans =
0.09754 0.2785 0.54688 0.95751 0.96489
>> r.State = s;
>> rand(1,5)
ans =
0.09754 0.2785 0.54688 0.95751 0.96489

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Noam Mazor
Noam Mazor 2017-6-28
Hi, No, the C implementation has a function (init_by_array) that maps arbitrary array (in any length) into a state vector.
Thanks!

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