str = fileread('hector_400km.txt');
lines = regexp(str, '\r\n|\r|\n', 'split');
for line = 20 : length(lines)
modifiedData = str2num(lines{line})*0.89;
% This check is done because I noticed some lines (e.g. 620) are not data to be
% multplied:
if ~isempty(modifiedData)
nSpaces = 6 - numel(num2str(floor(modifiedData(1))));
lines{line} = [repmat(' ',1,nSpaces) num2str(modifiedData,'%9.2f')];
end
end
fid = fopen('hector_400km_new.txt','w');
fprintf(fid,'%s\n',lines{:});
fclose(fid);
This should preserve the spaces and the formatting, otherwise, if you don't care about that the code can be simplified and you can write a .csv with writecell.
