Changing the matlab seed

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Arvind Ganesh
Arvind Ganesh 2018-9-21
评论： Arvind Ganesh 2018-9-21
The seed is not changing when I close the Matlab and open a new one. The seed is always being set as 0. How can I fix this?

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回答（2 个）

Bjorn Gustavsson
Bjorn Gustavsson 2018-9-21
Your question is a bit on the vague end - but I'll guess that you're asking about the seed for the random number generator...
If that's the case you should take a look at the help for rand, or look for the documentation pages "Updating Your Random Number Generator Syntax". From the former there is a link towards the latter, the latter describes in detail how to randomize the start of the random number sequence...
HTH
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Stephen23
Stephen23 2018-9-21
编辑：Stephen23 2018-9-21
"This is not supposed to happen. The seed should change when I close and open a new Matlab window."
Yes, it is supposed to happen. This is exactly the documented behavior. In fact this is such a common topic that there is a whole page devoted to explaining this:
https://www.mathworks.com/help/matlab/math/why-do-random-numbers-repeat-after-startup.html
That page also explains how to get different random numbers, and is easy to find using any internet search engine.
Arvind Ganesh
Arvind Ganesh 2018-9-21
Thank you. That is helpful.

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Dennis
Dennis 2018-9-21
You can use
rng('shuffle')
For more information have a look here

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