Average multiple vectors with different lengths
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I performed 3 measurements with different lengths of time. I would like to average those measurements without losing data. The measurements are stored in separate excel files which I can load each iteration of a for loop.
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Rik
2020-5-25
1 个投票
Pad the shorter vectors with NaN and use the 'omitnan' flag in mean.
2 个评论
Harm Gilsing
2020-5-25
Rik
2020-5-25
Sure:
A=[1 2 5];
B=[4 3];
C=[4 3 2 1 5];
alldata={A,B,C};%put them all in a cell for convenience
maxlen=max(cellfun('prodofsize',alldata));
for n=1:numel(alldata)
current_elem=numel(alldata{n});
if current_elem<maxlen
alldata{n}((current_elem+1):maxlen)=NaN;
end
end
%show the result of this loop
clc
[A,B,C]=deal(alldata{:})
mean([A;B;C],'omitnan')
%or better:
extradim=1+ndims(alldata{1});
bigarray=cat(extradim,alldata{:});
mean(bigarray,extradim,'omitnan')
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