how to read sequence of files that are seemingly random
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I am trying to read 1000+ files with the following filename format: myPos_HH_MM_SS_SSS.mat. There seems to be no pattern for HH_MM_SS_SSS. How do I perform this?
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dpb
2018년 7월 20일
편집: dpb
2018년 7월 20일
d=dir(fullfile('YourBaseDirectory','myPos_*.mat');
for i=1:length(d)
load d((i).name
...
% Do what ever needs done with variables in the .mat file here
...
end
will process in alphabetical order. If need in chronological order then
d=dir(fullfile('YourBaseDirectory','myPos_*.mat');
dn=[dn(:).datenum].'; % get the datenums for each file
[~,ix]=sort(dn); % and sort ascending, save order index
d=d(ix); % rearrange the directory struct order
From here on, everything's the same...
for i=1:length(d)
load d((i).name
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Image Analyst
2018년 7월 20일
cgo, that's what I did. Did you see my answer below? No sorting, just going through your mat files one-by-one just as dir() gives them to you.
Image Analyst
2018년 7월 20일
You did not ask for any sorting (not sure why others are sorting). You simply asked how to read files that have random names, not a sequence in any particular alphanumeric order. So that means you can simply use dir('*.mat') to read the files, as per the FAQ: https://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F
% Specify the folder where the files live.
myFolder = pwd; % or wherever;
% Check to make sure that folder actually exists. Warn user if it doesn't.
if ~isdir(myFolder)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
uiwait(warndlg(errorMessage));
return;
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.mat'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
numberOfFiles = length(theFiles);
fprintf('Found %d .mat files in folder: "%s".\n', numberOfFiles, myFolder);
for k = 1 : numberOfFiles
baseFileName = theFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
fprintf(1, 'Now loading %s\n', fullFileName);
% Now "read" (load) the mat file. Returned value will be a structure.
s = load(fullFileName)
% Now do whatever you want with s.
end
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