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

Question

H R 2017-3-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/332448-repeat-a-string-several-times-and-put-it-somewhere-in-a-text-file

回答： Jan 2017-3-29

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.

3 个评论
显示 1更早的评论隐藏 1更早的评论

H R 2017-3-29

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 2017-3-29

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

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2017-3-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/332448-repeat-a-string-several-times-and-put-it-somewhere-in-a-text-file#answer_260824

在 MATLAB Online 中打开

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);