persistent init and rng

2015 4 23

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I found the following command in a built in function in MATLAB, can anyone please explain to me what they mean?

    persistent init;
    if isempty(init)
        init = 1;
        rng(seed);
    end

Thanks

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Image Analyst 2015-4-23

Which function? If you say "doc rng" (or whatever function you want), does it bring up the help?

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