how to compare two files line by line?

Question

Zineb EL MORCHID 2016-3-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/272943-how-to-compare-two-files-line-by-line

评论： Adam Danz 2021-11-20

I want to compare two files line by line and count how many lines they have in common , I tried the code below , but it doesn't work , somehow MATLAB stops working , ">>" just disappear

f = fopen('nv.txt','at');
fid = fopen('test.txt');
k = 0;
while ~feof(fid)
  s1 = fgetl(fid);
    if ~isempty(s1)
       while ~feof(f)
          s2 = fgetl(f);
             if ~isempty(s2)
                    if(strcmp(s1,s2))
                         k = k+1;
                    end
             end
       end 
    end
end 
fclose(fid);
fclose(f);
disp(k);

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Image Analyst 2016-3-12

If the second line is missing in one of the files, (and the rest of the lines are just moved up one) then do you say that from line 2 on they are all different?

What if the lines are all there but in some different order?

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Answer 1

MHN 2016-3-12

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/272943-how-to-compare-two-files-line-by-line#answer_213301

编辑：MHN 2016-3-12

在 MATLAB Online 中打开

f = fopen('nv.txt');
fid = fopen('test.txt');
k = 0;
while ~feof(fid)
  s1 = fgetl(fid);
  frewind(f) % start from the first line of the second file
    if ~isempty(s1)
       while ~feof(f)
          s2 = fgetl(f);
             if ~isempty(s2)
                    if(strcmp(s1,s2))
                         k = k+1;
                    end
             end
       end 
    end
end 
fclose(fid);
fclose(f);
disp(k);