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Initialize segments matrix to improve performance #1

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8 changes: 5 additions & 3 deletions Segmentation/segmentSlidingWindow.m
Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,13 @@
function segments = segmentSlidingWindow(data, wSize, sSize)
len = size(data,1);
wCurr = 1;
segments = []; % todo: init to make faster
segments = zeros(ceil((len-wSize)/sSize),2); % improved performance
i = 1;
while (wCurr<len-wSize)
segments = [segments; wCurr wCurr+wSize]; % start stop
segments(i,:) = [wCurr, wCurr+wSize]; % start, stop
wCurr = wCurr+sSize; % step forward
i = i + 1;
end
segments = [segments; wCurr len]; % add residual
segments(end,:) = [wCurr len]; % add residual
end