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    %% RMS Levels of 2-D Matrix Along Specified Dimension
% Create a matrix where each row is a 100 Hz sinusoid sampled at 1 kHz with
% a different amplitude. The amplitude is equal to the row index.

% Copyright 2015 The MathWorks, Inc.


%%
% Compute the RMS levels of the rows specifying the dimension equal to 2
% with the |DIM| argument.

t = 0:0.001:1-0.001;
x = (1:4)'*cos(2*pi*100*t);

y = rms(x,2)