Multiple Text Files to a Single Output (Matlab)

Question

I am new to Matlab and I am struggling with a problem. I have 35 text files, each with different name, and I want to take all of these 35 text files and make them as one. Each file has 2 columns and almost 2000 rows.

The only thing I 've come up so far is to read the text files into Matlab using

for i=1:length(files)

    eval(['load ' files(i).name ' -ascii']);

end

and make the matrix manually using

final = horzcat(AA2,AA3,AA4,MN2,MN4....)

until I got to the last one.

Is there an easier way? In the future I will be using more than 100 text files so doing it manually is really time consuming!

Thank you :)

Because when I do that, I can train the data using Neural Network Tool. Is there another way I can do that except Matlab? — Chrysovalando
– Chrysovalando, Commented Jul 8, 2013 at 9:49

Community · Accepted Answer · 2017-05-23 12:32:23Z

2

You could do this outside of MATLAB:

click here if you're on OSX/Linux
click here if you're on Windows

If you really want to stick to MATLAB,

A = [];
for ii = 1:length(files)

    % load new contents
    newA = load(files(ii).name, '-ascii');

    % concatenate horizontally
    A = [A newA];  %#ok

end

% save final output
save('outputFile.txt', 'A')

edited May 23, 2017 at 12:32

CommunityBot

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answered Jul 8, 2013 at 9:52

Rody Oldenhuis

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2 Comments

Rody Oldenhuis Over a year ago

@Chrysovalando: Just remember you can mark my answer as "accepted" by clicking the big tick mark on the left of my answer. Happy to help!

Dennis Jaheruddin Over a year ago

Very nice as it completely avoids eval. If you have to deal with lots of files with a known number of rows and 2 columns you can consider preallocating A. Start with A = zeros(numberOfRows,length(files)*2) and assign like so: A(:,2*ii-1:2*ii) = newA.

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