How to write a for-loop to read 1000 text files in Matlab?

Question

I have 1000 text files that their names are A0000.txt, A0001.text, ..., A1000.text. I want to read in the information in the text files and store some of them in an excel file or a csv file (csv is preferred).

How should I define a for loop that can do this task?

I can use this function A = textread('A0000.txt','%s') to read one text file, but I don't know how should I put it in a for loop. If the name of the files were 1.txt, 2.txt,..., 1000.txt it would be easier.

I would be thankful if you can provide any help.

Andrey Rubshtein · Accepted Answer · 2014-07-10 17:42:22Z

5

You should use sprintf to generate the relevant strings:

for i=1:1000
    fileName = sprintf('A%04d.txt',i);
    A{i} = textread(fileName ,'%s')
end

The %04d tells sprintf that the number should have leading zeroes.

edited Jul 10, 2014 at 17:42

answered Jul 10, 2014 at 16:49

Andrey Rubshtein

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1 Comment

sara_123 Over a year ago

Thank you so much. It is working! There is just a typo : sprintf('A%04d.txt',i)

Andrey Rubshtein · Accepted Answer · 2014-07-13 12:04:42Z

3

The following generates a list of txt files contained in the current directory. It then reads in all the files. This is useful if the file names are not sequential.

filelist = dir([pwd() filesep '*.txt' ]);
fileNames = {filelist.name}';
nFiles = length(fileNames);

for i= 1:nFiles 
    TF{i} = textread(fileNames{i},'%s');  
end

edited Jul 13, 2014 at 12:04

Andrey Rubshtein

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answered Jul 10, 2014 at 22:21

Michael

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