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How can we create a distributed array for specific number of workers (cores) in MATLAB?

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Ammar 2017-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/351994-how-can-we-create-a-distributed-array-for-specific-number-of-workers-cores-in-matlab

编辑： Walter Roberson 2017-8-19

I have a question: How can we create a distributed array for specific number of workers in MATLAB? In other words, if we have 4 workers(cores) in our computer and we would like to designate just 3 workers to process a distributed array, how can we do that. I used the existing commands in this way:

a=[1 2 3 4 5 6]; b=codistributed(a);

Unfortunately, this instruction use all four workers!

Please, any idea how to solve this problem?

Kind regards Ammar

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Edric Ellis 2017-8-17

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You could either create the pool explicitly using only three workers

parpool(3)

Or, you could use spmd with the optional argument

spmd(3)
    b = codistributed(a);
end

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Ammar 2017-8-19

编辑：Walter Roberson 2017-8-19

Dear Edric,

I would like to thank you for this answer.

Please, could you help me find a solution for my second question ? https://uk.mathworks.com/matlabcentral/answers/351806-how-can-implement-parallel-pipeline-using-3-workers-in-one-computer

Regards Ammar

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