How do I calculate the RMS of every 5 values?

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Shawn Imming 2016-11-3

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编辑： krishna teja 2023-7-28

Hello, I have a vector of 66000 values and I would like to know the root mean square (RMS) of every 5 values. Do I need a loop for this? Or is there some easier way to solve this?

Thanks in advance! Shawn

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Guillaume 2016-11-3

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编辑：Guillaume 2016-11-3

在 MATLAB Online 中打开

If you mean you want the RMS of the first 5 values, followed by the RMS of the next 5 values, etc., then assuming your vector length is a multiple of 5 simply reshape it into columns of 5 elements:

rms = sqrt(mean(reshape(yourvector, 5, []) .^ 2));

If you mean you want a moving rms (rms of elements 1-5, rms of elements 2-6, etc.), then use movmean:

movrms = sqrt(movmean(yourvector .^ 2, 5));