About random number generators

Hi everyboby

I want to create a program on simulink which use a random number box but I have seen that its output is repeated at each step of the simulation. So how can I change the seed of this program to get the good result.

I use actually matlab 2010a, and I tried rng bgut not working.

Thank you.

Answer 1

[Lucas García]

As you have found out, using rng is the way to go with the current MATLAB version.

Although currently discouraged, you can use the former synthax for changing the seed with older MATLAB versions: http://www.mathworks.es/es/help/matlab/math/updating-your-random-number-generator-syntax.html

rand('seed', sd)

[ahmed abrous]

Yes, exactly, but I don't have Matlab 2013 on my computeur. Also I want to use uniform random number block on simulink, and when I read the help it says "Output is repeatable for a given seed". So the goal is to change this seed on simulink at each sample time of the simulation.

Answer 2

[Dishant Arora]

   doc se_randomizeseeds

[ahmed abrous]

Hi,

I have matlab 2010a, and the function is not available. Any ideas?

[Dishant Arora]

http://www.mathworks.com/matlabcentral/answers/28049-simulink-setting-different-random-number-generator-seeds-even-when-using-past-simstate

[Dishant Arora]

You need to stop and change the seed before every simulation

Answer 3

[ahmed abrous]

It's okay for me with the Embedded Matlab Function and the seed change at every sample time. Thank you.