Adding extension to fille

Question

Mateusz Brzezinski 2021-11-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1582514-adding-extension-to-fille

评论： Image Analyst 2021-11-10

I wrote such code that imports multiple files:

Folder   = 'Data';
FileList = dir(fullfile(Folder, '**', '*.txt'));
Strings = cell(1, numel(FileList));
for iFile = 1:numel(FileList)
    File     = fullfile(FileList(iFile).folder, FileList(iFile).name);
    Strings{iFile} = load(File);   
end

In Data folder I have files like:

The problem is they don't have any extension (simple Ascii format of numbers that can be easily open with notepad).

Is there any option to import "any" file type or files without extension?

I have tried this, but it gives me an error.

FileList = dir(fullfile(Folder, '**', '*.*'));
%or
FileList = dir(fullfile(Folder, '**', '*.data.1'));

Any suggestion? I would appreciate any help

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Geoff Hayes 2021-11-9

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@Mateusz Brzezinski - what is the error message when you try to use either of the last two lines of code? Does your Data folder have folders or just files? If just files, then you may be able to use

FileList = dir(Folder)

to get a list of all files in that folder.

Mateusz Brzezinski 2021-11-9

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Hello, thanks for answer.

Error is:

Error using load
Unable to read file
'C:\Users\brzezinskim_admin\OneDrive\06
[Education]\Projects\SPP2019\Programs\MathLab\CARS
Importer\Data\.'. Input cannot be a directory.
Error in Cars_Import_singles_Save_map (line 23)
    Strings{iFile} = load(File);
    

for all of:

FileList = dir(fullfile(Folder, '**', '*.*'));
%or
FileList = dir(fullfile(Folder, '**', '*.data.1')); 
%or
FileList = dir(Folder)
%or
FileList = dir(fullfile(Folder, '**'));
%or
FileList = dir(fullfile(Folder));

I have only those filles (without extension), nothing else.

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Answer 1

Stephen23 2021-11-9

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Simpler:

P = 'Data';
S = dir(fullfile(P,'**','*'));
S = S(~[S.isdir]);
for k = 1:numel(S)
    F = fullfile(S(k).folder,S(k).name);
    S(k).data = readmatrix(F);
end

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Mateusz Brzezinski 2021-11-10

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I modified it to:

P = 'Data';
S = dir(fullfile(P,'**','*'));
S = S(~[S.isdir]);
for k = 1:numel(S)
    F = fullfile(S(k).folder,S(k).name);
    Z(k).data = readmatrix(F);
end

And now it's fine

Stephen23 2021-11-10

"I modified it to:"

Why do you need to create a second structure Z, when S already exists?

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Answer 2

Image Analyst 2021-11-9

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https://ww2.mathworks.cn/matlabcentral/answers/1582514-adding-extension-to-fille#answer_827479

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In your loop over files, check the isdir property to skip directories

for iFile = 1:numel(FileList)
    if FileList(iFile).isdir
        continue; % Skip files if they are a directory.
    end
    fullFileName = fullfile(FileList(iFile).folder, FileList(iFile).name);
    Strings{iFile} = load(fullFileName);   
end

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Mateusz Brzezinski 2021-11-9

It's working but now I have sth like that - 2 first cells are empty. Can I get rid of anyhow in the creation process ?

Image Analyst 2021-11-10

OK, you didn't tell me you were going to load it into another cell array using the same index. If you had, I would have said to remove them like Stephen did, or else you can have a second counter index in the loop.

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