sample code array question

Question

Rambo 2011-4-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/5145-sample-code-array-question

I found this code:

function SECTIONS = makeframe (Y, FS)

% Input the raw signal array and sampling rate % output: 25 critical frequency bands x number of timeframes % output values are energy strength

Y = convertmono(Y); len = length(Y); window = round(0.37.*FS); % hanning window width interval = round(0.0116.*FS); % 512 %interval = 1024; len = len - window; numintervals = len / interval; kk=1; hanw = hanning(window);

%SECTIONS = zeros(interval,numintervals); for ii = 1:interval:len % if ii+interval > len % interval = len-ii+1; % disp('coming to end'); % disp(interval); % disp(ii); % SECTIONS(ii:ii+interval-1,kk)=Y(ii:ii+interval-1); % else % SECTIONS(:,kk)=Y(ii:ii+interval-1); % (8:25pm) SECTIONS(:,kk) = dividefreqs(Y(ii:ii+interval-1),FS).'; % disp(ii) % fprintf('Grabbing interval %g to %g\n',ii,ii+window-1); SECTIONS(:,kk) = dividefreqs(Y(ii:ii+window-1).*hanw,FS).'; % end

% disp(size(SECTIONS)); kk = kk+1; end

One thing that I don't understand is how the array SECTIONS is used since its creation is commented out %SECTIONS = zeros(interval,numintervals); ?