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getrmsfeat.m
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getrmsfeat.m
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%
% RMS feature (Root Mean Square).
function feat = getrmsfeat(x,winsize,wininc,datawin,dispstatus)
if nargin < 5
if nargin < 4
if nargin < 3
if nargin < 2
winsize = size(x,1);
end
wininc = winsize;
end
datawin = ones(winsize,1);
end
dispstatus = 0;
end
datasize = size(x,1);
Nsignals = size(x,2);
numwin = floor((datasize - winsize)/wininc)+1;
% allocate memory
feat = zeros(numwin,Nsignals);
if dispstatus
h = waitbar(0,'Computing RMS features...');
end
st = 1;
en = winsize;
for i = 1:numwin
if dispstatus
waitbar(i/numwin);
end
curwin = x(st:en,:).*repmat(datawin,1,Nsignals);
feat(i,:) = sqrt(mean(curwin.^2));
st = st + wininc;
en = en + wininc;
end
if dispstatus
close(h)
end