rand returns me the same numbers on Simulink?

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Teng Da Wen
Teng Da Wen 2020-6-23
评论： Teng Da Wen 2020-6-23
Hello,
I'm making a simulation of how much time is required for an Item to get through some Workstation, and I wanted to give some kind of randomness to worktime, I tried by using a Matlab action service time source, and having a minimum Worktime on which is added the max delay the station can have multiplied for a rand(1) function (as shown below).
However running the simulation multiple times I noticed the value of service time that is returned is always the same, what am I doing wrong? how should I solve it?
Thanks in advance

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采纳的回答

Reeshabh Kumar Ranjan
Hey Teng,
I think this might be the reason of repetition of numbers: https://in.mathworks.com/help/matlab/math/why-do-random-numbers-repeat-after-startup.html
See if it solves your problem.
  1 个评论
Teng Da Wen
Teng Da Wen 2020-6-23
Ye it was it, I solved this by adding this line of code, Actually I had already tried with rng('Shuffle') but it didn't work, then I found out on simulink I need to declare the function as an exstrinsic one, thanks.
coder.extrinsic('rng');
rng('shuffle')

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