MATLAB:在parfor或并行计算中生成随机数 [英] MATLAB: Generating random numbers in parfor or parallel computing

问题描述

在一个for循环中，我使用一个随机种子来生成所有随机数".它们是非常随机的，因为我一次从流中取出一个，没有任何间隙.

In a single for loop, I use a single random seed to generate all the "random numbers". They are very random as I take one from the stream at a time, without any gap.

但是，在parfor中，每个工作人员使用不同的随机种子，因此，获得的数字可能会相互干扰.因此，它们并不是真正随机的，因为它们不是来自单个种子.

However, in parfor, each worker uses a different random seed, therefore, the numbers obtained may have interference with each other. Therefore, they are not really random as they do not come from a single seed.

对于我来说，我也不知道每个工人事先需要多少个随机数.我该如何解决这个问题?

Also, for my case, I do not know how many random numbers each worker needs beforehand. How can I solve this problem?

推荐答案

在parfor中，工作人员使用来自专门设计为并行使用的随机数生成器的不同流.因此，您可以依靠parfor内部产生的具有合理统计质量的随机数.此处更多信息: http://www.mathworks.com/help/distcomp/control-random-number-streams.html

In parfor, the workers use different streams from a random number generator that is specifically designed to be used in parallel. Therefore, you can rely on the random numbers generated inside parfor having reasonable statistical qualities. More here: http://www.mathworks.com/help/distcomp/control-random-number-streams.html

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