Search for all mat datafiles in directory

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Seb 2017-7-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/349379-search-for-all-mat-datafiles-in-directory

编辑： Stephen23 2017-7-19

I want to return a cell array containing absolute file path/locations of all .mat datafiles given an initial folder location. It should search all subfolders etc. Not sure how to implement this, and if it should be done recursively...?

Any ideas?

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Stephen23 2017-7-19

@Seb: what version of MATLAB are you using?

Seb 2017-7-19

2016b. I essentially need the output of

dir /*.mat

held in a variable

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Answer 1

Stephen23 2017-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/349379-search-for-all-mat-datafiles-in-directory#answer_274722

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Something like this perhaps:

D = the root directory;
S = dir(fullfile(D,'**','*.mat'));
N = {S.name};
F = {S.folder};

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Seb 2017-7-19

在 MATLAB Online 中打开

ok this is what I have adapted it to so far:

       function self = find_matfiles(self)
           FileList = dir(fullfile(uigetdir(),'**','*.mat'));
           amount_files = size(FileList);
           amount_files = amount_files(1,1);
           for i = 1:amount_files
               x = char(FileList(i).name);
               y = char(FileList(i).folder);
               z = '\';
               s1 = strcat(y,z);
               s2 = strcat(s1,x);
               disp(s2);
              load(s2); 
           end
       end

However it wont load the file into the workspace(or any of them)

Stephen23 2017-7-19

编辑：Stephen23 2017-7-19

在 MATLAB Online 中打开

@Seb: Your code has "features" that should be fixed:

char is confusing and totally superfluous as the names are already character.
using fullfile is much better than hardcoding with file separators.
using fullfile is much better than using strcat.
using size is confusing: you should simply use numel.
self is not used anywhere, and implies that you are trying to write a MATLAB function as it were a Python class. What is self?
you should always load into a structure:

S = load(...);

variables in this function's workspace are local to that workspace. If you want the data to be available in another workspace (e.g. the base workspace) then you will need to pass it as an output argument. MATLAB variables do not magically jump between workspaces:

https://www.mathworks.com/help/matlab/matlab_prog/base-and-function-workspaces.html

https://www.mathworks.com/help/matlab/matlab_prog/share-data-between-workspaces.html