how to obtain the mean for single variable/location of a multiple 3d .mat file ?

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Hanisah noh
Hanisah noh 2020-5-27
评论： Ameer Hamza 2020-5-28
i have 240 files of 3dimension .mat files with 140x122x118
i have obtain the mean of these files using this method (credits to matlab community):
...
files=dir('*.mat');
totalfile = numel(files);
C = cell(1,totalfile);
for a = 1:totalfile
T = load(files(a).name)
C(a) = struct2cell(T);
end
M = cat(4,C{:})
M(isnan(M))=0 % replace NaN to 0
ave = mean(M,4) % mean of the 4th dimension
however,
how do i obtain the mean of a single location/variable from all these 240 files, eg: location{100,10,50} ?
thank you

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Ameer Hamza
Ameer Hamza 2020-5-27
Something like this
files=dir('*.mat');
totalfile = numel(files);
V = zeros(1,totalfile);
for a = 1:totalfile
T = load(files(a).name)
C = struct2cell(T);
V(a) = C{1}(100,10,50)
end
V(isnan(V))=0 % replace NaN to 0
ave = mean(V)
  2 个评论
Ameer Hamza
Ameer Hamza 2020-5-28
It is chained indexing in MATLAB. Normally chained indexing is not allowed in MATLAB because parenthesis are used both for functions and indexing. However, for cell arrays, chained indexing is allowed.

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