Exporting values from Matlab into a Formatted Text File

I created a code in MatLab that produces outputs that I want to place into a formatted text file. I placed pound signs in the text file which the values from Matlab would replace. How would I go about coding this?

Answer 1

[Are Mjaavatten]

Here is one way to do it. Note that I collect all the output values in a cell array of strings.

First, a sample input file, with $ signs:

$ seconds was the first 100 m world record, set in 1891.
The record has been improved several times since then.
The current record of $ seconds was set by $ in $.

Next, the code:

infile  = 'word_records.txt';
outfile = 'world records_new.txt';
data = {'10.8','9.572','Usain Bolt','2009'};

fid = fopen(infile);
c = fread(fid);   % Read file as binary, keeping line feeds.
fclose(fid);
old = char(c');  % Turn integer array into string

% Split string at $ signs:
r = regexp(old,'\$','split');

% Create new string:
new = '';
start = 1;
if isempty(r{1})    % If text start with $
    new = data{1};
    start = 2;
end
for k = start:length(r)
    new = [new,r{k}];
    if k <= length(data)
        new = [new,data{k}];
    end
end

% write new file:
fid = fopen(outfile,'wt');
fprintf(fid,'%s',new);
fclose(fid);