To write a text file readable by the importdata function

Hi all,

I use the importdata function on an ascii file and extract a structure containing the cell array textdata. Let say that my structure is called 'donnee' :

donnee = importdata(C:\users\Quentin\Mes Documents\Data.txt');

I then work with the information that is inside each cell of donnee.textdata and I modify donnee.textdata.

I would then like to write to a new text file containing my donnee.textdata cell array. I do it in the following way :

fid2 = fopen('C:\users\Quentin\Mes Documents\Data-updated.txt');

size2 = size(donnee.textdata);
n = size2(1); %number of lines
m = size2(2); %number of columns

for i = 1:n

    for j=1:m

        fprintf(fid2,'%s',donnee.textdata{i,j});
        fprintf(fid2,'\t');

    end

    fprintf(fid2,'\n');

end

fclose(fid2);

Everything works and when I read with Excel for instance, it looks very good ! My problem is when I want to use importdata on the file I created, it doesn't work. The delimiters '\t' are not taken into account and I have a struct only containing one char array per line and not all the lines (80 over 170000).

I tried to use other functions such as dlmread, dlmwrite, struct2File, etc...

The problem is from when I am writig or when I am reading I guess. Anyone has an idea of how I could do ?

Do not hesitate to ask me any precision/code details.

Thank you very much !

Quentin

[Walter Roberson]

More efficient would be:

for i = 1 : n
   fprintf(fid2, '%s\t', donnee.textdata{i,1:end-1});
   fprintf(fid2, '%s\n', donnee.textdata{i,end});
end

[Quentin]

Yes it is ! And with the size of my inputs, I print it in a few secondes rather than 5 to 6 minutes.

Thank you !!!