Reading multiple ascii files and generate 3D matrix

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Ali Kareem 2016-5-14

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https://ww2.mathworks.cn/matlabcentral/answers/284165-reading-multiple-ascii-files-and-generate-3d-matrix

评论： Walter Roberson 2016-5-16

采纳的回答： Walter Roberson

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Hello

I have 20 ascii files with a name (A1, A2, A3...A20) each one has 50000 row and 200 column. I am trying to import and read this files and save data in 3D matrix with dimensions (50000*200*20)

I used below code but it is not getting through

 Folder = 'D:\My_Files';
Pattern = fullfile(Folder, 'A1'); 
Files = dir(Pattern);
A = []; 
for k = 1 : length(Files)
    baseFileName = Files(k).name;
    fullFileName = fullfile(Folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    data = importdata(fullFilename); 
    A = cat(3, A, data);    
end

when I run code I got error Undefined function or variable 'fullFilename'. Error in New (line 11) data = importdata(fullFilename);

采纳的回答

Walter Roberson 2016-5-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284165-reading-multiple-ascii-files-and-generate-3d-matrix#answer_222098

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data = importdata(fullFileName);

MATLAB is case-sensitive.

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Ali Kareem 2016-5-14

编辑：Walter Roberson 2016-5-16

Hello,

Thank you so much for your reply. Please, I checked all files. all has (5520*9). but I still found in my structure. A (1*1*18) cell, Data (1*1 struct). and inside data files Data(5520*9). I still can not find other data. I tried to find the other data but I failed. I used val(:,:,1) and I got error (Undefined function or variable 'val'.)

Walter Roberson 2016-5-16

在 MATLAB Online 中打开

Folder = 'D:\My_Files';
Pattern = fullfile(Folder, 'A*'); 
Files = dir(Pattern);
nFiles = length(Files);
A = zeros(5520,9,nFiles);
for k = 1 : nFiles
    baseFileName = Files(k).name;
    fullFileName = fullfile(Folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    data = importdata(fullFilename); 
    A(:,:,k) = data.Data;
end