How can I make each iteration of a for each block create a unique random number?

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Eugene Ofori 2022-11-28

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评论： cr 2022-11-28

I want to create a random number for all iterations of my For Each Block at each time step. I've tried by simply adding a random number in my For Each Subsystem but I get the same random number outputted for each iteration. See a test model of this below.

How can I achieve generating unique random numbers for each iteration?

One method I know exists would be to have it outside the for each loop but that is undesirable because:

My model is several subsystems beneath the top level of the for each loop so it would be undesirable.
I would like to create this into a library block so I don't want it to be dependent on signals at the top level.

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Answer 1

cr 2022-11-28

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You will have to generate a vector of random numbers outside and pass it as an input. Default partitioning of this vector might not happen the way you need it.

Cheers.

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Eugene Ofori 2022-11-28

That was a solution I was hoping to avoid. I wanted to do it internal to the for each block though.

cr 2022-11-28

Not sure if that is possible. The rng blocks spit a number (or a vector of numbers) in sequence for each time step. The iterations inside the foreach block are not individual time steps -just the same time step iterating over each element in the vector signal.

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