Can't understand what rng(seed) does.

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I have come across this command in matlab. rng(seed). I used the help to understand what its means, and I still don't get it. Can anyone help me understand what it does?
rng Control the random number generator used by RAND, RANDI, and RANDN.
      rng(SD) seeds the random number generator using the non-negative
      integer SD so that RAND, RANDI, and RANDN produce a predictable
      sequence of numbers.

THanks.

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Answer 1

the cyclist 2015-4-20

编辑：the cyclist 2015-4-20

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The Random seed Wikipedia page might help you understand.

This page from stackoverflow may also help.

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DM 2015-4-20

Mu understanding after reading the page from stackoverflow is that you pick a seed and when you use it in rng, your will get the same sequence of numbers once you use rand, randi?

the cyclist 2015-4-20

Yes. You can think of the pseudorandom numbers from the generator as a long -- very long -- list of numbers that are uncorrelated with each other, and the seed determines where in that list you start.

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