Repeat a string several times and put it somewhere in a text file

1.a: I have a piece of code that generates a particular text 10 times (see below), how can I do this without a loop?

1.b. I have also a text file somewhere in which there is a particular symbol "[$1]" (excluding the quotation marks), I would like to replace [$1] with the resulting string in 1.a. ( If I use a loop as above to generate the string, it is easy, but I want to be able to do this operation without a loop)

s6=[];
for i=1:10    
    s1= 'this is a new house';
    s2='Gas 1000 2 3 4 water  ';
    s2a=num2str(1000.900);
    r=[s2a, char(10)];

      s3=[s2,' ', r, char(10)];
      s4='TIME';
      s5=num2str([1:10]');
      %s5=mat2str([1:100]');
      rr='';
      for j=1:size(s5,1)
          rr=[rr,s5(j,:),char(10)];
      end

      s6= [s6 s1,char(10),s3,s4,char(10),rr];

end

I appreciate your comments and help.

[Stephen23]

Have you tried using strrep or regexp ?

[H R]

searching is fine. My main problem is with 1a. Is there another method not to use a loop structure (i.e. for i=1:10) and use other method to combine the string 10 times and generate a new "single" string (not an array).

[H R]

I think I found a way to do it with repmat(s6, 1,10)

Answer 1

[Jan]

For replacing the string:

Ins = repmat(s6, 1, 10);
Str = fileread(FileName);
Str = strrep(Str, '[$1]', Ins);
fid = fopen(FileName, 'w');
if fid == -1, error('Cannot open file %s', FileName); end
fwrite(fid, Str, 'char');
fclose(fid);