Export Sorted Columns to Existing File

Hello, I am running through ~50 text files and read them in order to sort the columns of the data, however the problem arises in the printing/exporting of the data. I would like to overwrite the files that I am reading in with the new, sorted data, and thus do not want to have to specify an output file. My current codes is as follows.... slopef = dir('*.out'); numfiles = length(slopef); mydata = cell(1, numfiles);

for k = 1:numfiles %fid=fopen(slopef(k).name,'a+'); fid=fopen(slopef(k).name,'w'); mydata{k} = load(slopef(k).name);

    temp=sort(mydata{k});

    ds=mat2dataset(temp,'VarNames',{'YYYY','MM','DD','TMIN','TMAX','RAIN'});
    %export(ds,'File','Nolables.txt','WriteVarNames',false)

    fprintf(fid,ds.TMIN)
    %csvwrite('blah',temp)

fclose(fid);

end

Answer 1

[dpb]

Steps:

fopen for rw
read
sort
frewind
write
fclose

repeat 'til done...