This function is a "decorator" for the Matlab in-build 'randn' function. It takes an additional first argument (beta) which shapes the spectral characteristic of the data (in all dimensions) as f^beta. The output data is scaled to the original mean and standard deviation.
Marcin Konowalczyk (2021). randnd (https://github.com/MarcinKonowalczyk/randnd), GitHub. Retrieved .
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