how to read sequence of files that are seemingly random

8 次查看（过去 30 天）
CLARK KENDRICK GO
CLARK KENDRICK GO 2018-7-19
编辑： dpb 2018-7-20
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?

请先登录，再回答此问题。

回答（2 个）

dpb
dpb 2018-7-20
编辑：dpb 2018-7-20
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
  4 个评论
显示 2更早的评论
Image Analyst
Image Analyst 2018-7-20
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.
dpb
dpb 2018-7-20
Which I re-edited to put back what I inadvertently deleted... :)

请先登录，再进行评论。

Image Analyst
Image Analyst 2018-7-20
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

类别

在 Help Center 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by