read multiple files in from a directoryusing matlab

Question

How can read multiple files in from a directory using matlab? Can someone please help correct my code below:

files =dir(fullfile(directory_path,'*.dat'));
numfiles = length('*.dat');
mydat = cell(1, numfiles);

for k = 1:numfiles
    mydata{k} = fopen([directory_path,files(k).name]);
    values=textscan(mydata{k},'%s','delimiter','\n');
    fclose(fid);
    %fprintf(values)
    ....do something with values.....

end

.dat files are just many rows and single column of strings that need to be read in a loop and processed further.

Thanks

Zizy Archer · Accepted Answer · 2017-03-03 11:45:33Z

1

fopen gives file pointer, which you save to mydata{k}, and try to release by fclose(fid). There is no fid, so it doesn't work. What you should do is replace mydata{k} with fid. And probably values by mydata{k}.

The other bug is in numfiles = .... You will always have numfiles = 5, as there are 5 characters in the '*.dat'.

numfiles = length(files);

would be better, although you would also count directories. Check one of the other questions how to solve this.

answered Mar 3, 2017 at 11:45

Zizy Archer

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user27976 · Accepted Answer · 2017-03-03 13:00:20Z

0

Thanks Zizy Archer.

I solved the problem this way:

files =dir(fullfile(directory_path,'*.dat'));
numfiles = length(files);

for k = 1:numfiles
    textFileName = [directory_path,files(k).name]
    fid = fopen(textFileName, 'r');
    textData = textscan(fid,'%s','delimiter','\n');
    fclose(fid);

    data = textData{:,1}
end

answered Mar 3, 2017 at 13:00

user27976

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