How to loop through N different folders with M different.txt files(text001.txt.....text010.txt) with (O rows and P columns). and plot the average(text001.txt.....text010.txt)of M different figures from the N folders.

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MS 2020-3-15

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https://ww2.mathworks.cn/matlabcentral/answers/510998-how-to-loop-through-n-different-folders-with-m-different-txt-files-text001-txt-text010-txt-with

回答： MS 2020-3-16

close all
clear all
D = 'D:\dataprocessing\';
S = dir(fullfile(D,'*'));
N = setdiff({S([S.isdir]).name},{'.','..'}); % list of subfolders of D.
sums = [];
counts = [];
for ii = 1:numel(N)
    T = dir(fullfile(D,N{ii},'*')); % improve by specifying the file extension.
    C = {T(~[T.isdir]).name}; % files in subfolder.
    for jj = 1:numel(C)
        F = fullfile(D,N{ii},C{jj})
                fprintf('test%s\n',F);
 
    S(ii).data = F(:);
    end
end
X = vertcat(S.data);
avgArrivalDelay = sum(sums)/sum(counts)

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Rik 2020-3-15

Would the data fit in your memory all at once if you read all data and then did the processing?

MS 2020-3-15

yes. it will fit in my memory. Please modify the code for average the files and plot it.

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回答（2 个）

Image Analyst 2020-3-15

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https://ww2.mathworks.cn/matlabcentral/answers/510998-how-to-loop-through-n-different-folders-with-m-different-txt-files-text001-txt-text010-txt-with#answer_420241

在 MATLAB Online 中打开

Try this. Adapt as needed:

% Get a list of all txt files in the current folder, or subfolders of it.
fds = fileDatastore('*.txt', 'ReadFcn', @importdata)
fullFileNames = fds.Files
numFiles = length(fullFileNames)
% Loop over all files reading them in and plotting them.
for k = 1 : numFiles
	fprintf('Now reading file %s\n', fullFileNames{k});
	% Now have code to read in the data...
	% Now code to plot the data...
end