Selecting all folders using textscan.

Hi, I have some text files and i want to use textscan.

k1 = fopen('*/x/koo.txt');
c1 = textscan(k1,'%f %f %f');
fclose(k1);

I tried this code but it didnt work.

Thats my files with directories.

a/x/koo.txt
a/y/std.txt
b/x/koo.txt
b/y/std.txt
c/x/koo.txt
c/y/std.txt

How can i do it?

[Jan]

Whenever you write "didn't work" in the forum, post the error message or explain the difference between you expectations and the results. It is easier to solve a problem than to guess it.

Answer 1

[Jan]

Why do you assume that fopen('*/x/koo.txt') could find a file? Which file should be taken in your opinion? Most of all "c/y/std.txt" cannot be reached in any way.

FileList = {'a/x/koo.txt', 'a/y/std.txt', 'b/x/koo.txt', ...
            'b/y/std.txt',  'c/x/koo.txt', 'c/y/std.txt'};
C = cell(1, numel(FileList));
for iFile = 1:numel(FileList)
  fid = fopen(FileList{iFile}, 'r');
  if fid == -1, error('Cannot open file: %s', FileList{iFile}); end
  C{iFile} = textscan(k1, '%f %f %f');
  fclose(fid);
end

[Ali Dogan]

Thanks, But i dont understand clearly. Thats my cod;

    for i=1:3
    k1 = fopen('*/x/koo.txt');
    c1 = textscan(k1,'%f %f %f');
    fclose(k1);

    x=c1{1};
    y=c1{2};
    z=c1{3};

    k2 = fopen('*/y/std.txt');
    c2 = textscan(k2,'%f %f %f');
    fclose(k2);

    stx=c2{1};
    sty=c2{2};
    stz=c2{3};

    xyz(iFile,1)=x;
    xyz(iFile,2)=y;
    xyz(iFile,3)=z;

    stt(iFile,1)=stx;
    stt(iFile,2)=sty;
    stt(iFile,3)=stz;
    end
    xyz
    stt

and thats the error message.

[Walter Roberson]

It is not possible to fopen() a file that uses "*" as part of the name. Well, it is, but the "*" has to really be present in the name. In other words, fopen() does not do any handling of wildcards: you need to tell it exactly which file you want to process, and it can only process one file at a time.

Answer 2

[Walter Roberson]

I suggest you use a File Exchange Contribution that supports searching for multiple files; you would search for koo.txt and std.txt files. The output would be in the same kind of structure that is used by dir(), so you would access the .name field of each item to determine the name

   dinfo = dir2(pwd, 'koo.txt', 'std.txt', '-r');
   for K = 1 : length(dinfo)
     thisfile = dinfo(K).name;
     fid = fopen(thisfile, 'rt');
     c = textscan(fid, '%f %f %f');
     fclose(fid);
     c1{K,1} = c{1};
     c1{K,2} = c{2};
     c1{K,3} = c{3};
     c1{K,4} = thisfile;
   end

The end result would be a something-by-4 cell array in which for any one row of the cell array, the first 3 columns correspond to the columns of input, and the 4th column has the file name (in case you care later.)