numfiles = 300;
concat = cell(1, numfiles);
for ii = 1:numfiles
filename = sprintf('data-%d.dat', ii);
concat{ii} = strrep(fileread(filename), ',', '.');
end
newFile = fullfile(tempdir, 'JoinedFile.dat');
FID = fopen(newFile, 'w');
if FID == -1, error('Cannot open file for writing'); end
fprintf(FID, '%s', concat{:});
fclose(FID);
Now the new file contains all data with dots instead of commas and can be imported at once.
[EDITED] Remove headerlines, which start with 'F':
concatC = cell(1, numfiles);
for ii = 1:numfiles
filename = sprintf('data-%d.dat', ii);
Str = strrep(fileread(filename), ',', '.');
CStr = regexp(Str, '\n', 'split');
CStr(strncmp(CStr, 'F', 1)) = [];
% Perhaps:
if isempty(CStr{end})
CStr(end) = [];
end
concatC{ii} = CStr(:);
end
concat = cat(1, concatC{:});
