MATLAB: Cut vector into many new vectors with defined lengths

cut vectorreduce vectorresize vector

I have a very long vector that I would like to cut up into new vectors of a specified length (400).

Best Answer

The easiest way to do what you want would be to use the mat2cell command. For instance, if you wanted to divide it into segments of lengths of [100, 150, 50, 25, 75]:

V = randi(99, 1, 400);
Vs = mat2cell(V, 1, [100, 150, 50, 25, 75]);
Vs4 = Vs{4};                % Addressing Cell #4

Here, ‘Vs’ is a (1x5) cell, and ‘Vs4’ is a (1x25) double.

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MATLAB: Averaging the selected vector ranges

hello

my 2 fold suggestion , first is new code according to your expected results , and second is based on sliding averaging - function is in attachement !

enjoy

samples = 1000;
VectorTime = 1 + sin(2*pi*(1:samples)/samples)+ 0.25*rand(1,samples);
buffer = 25;    % nb of samples for averaging 
% zero overlap mean averaging
for ci=1:floor(length(VectorTime)/ buffer)
    start_index = 1+(ci-1)*buffer;
    stop_index = min(start_index+ buffer,length(VectorTime));
    time_index(ci) = round((start_index+stop_index)/2);
    frr(ci) =mean(VectorTime(start_index:stop_index))  % 
end
figure(1),
plot((1:samples),VectorTime,'b',time_index,frr,'or');
% sliding avg method
out = myslidingavg(VectorTime, buffer);
figure(2),
plot((1:samples),VectorTime,'b',(1:samples),out,'r');

Best Answer

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MATLAB: A cycle for creating and working with zones

MATLAB: Averaging the selected vector ranges

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