How to find the lines of two words repeated many times in a .txt file

Question

Abdelhadi To'ma 2014-10-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/159784-how-to-find-the-lines-of-two-words-repeated-many-times-in-a-txt-file

评论： Abdelhadi To'ma 2014-10-23

I'm trying to find a two words (DATA & END ) repeated many times in a .txt file how I can get their positions or in any lines they are exist because I want to bring the numbers which are between these two words

this is a part of the file

-- Coefficient of friction (for calculation of temperature) -- SchmierTyp 0:Oil 1:Grease 2:Dry :TABLE FUNCTION ReibKoef INPUT X SchmierTyp TREAT

DATA

1      2     3
0,01  0,02  0,03

END

-- Coefficient of friction (for calculation of temperature) -- SchmierTyp 0:Oil 1:Grease 2:Dry :TABLE FUNCTION ReibKoef INPUT X SchmierTyp TREAT

DATA

1      2     3
0,01  0,02  0,03

END

and I'm trying to do this by typing

haystack = fopen('h1.dat','r');

needle = 'DATA';

line = 0;

found = false;

while ~feof(haystack)

    tline = fgetl(haystack);
    line = line + 1;
    if ischar(tline) && ~isempty(strfind(tline, needle))
        found = true;
        break;
    end

end

if ~found

line = NaN;

end

Thanks in advance

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Guillaume 2014-10-23

At first glance, your code looks correct. It will find the first line that contains 'DATA'. So what exactly is the problem you are having?

Abdelhadi To'ma 2014-10-23

I want to find all the lines that have DATA and END to be able to extract the numbers between the DATA and the END lines

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Answer 1

Michael Haderlein 2014-10-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/159784-how-to-find-the-lines-of-two-words-repeated-many-times-in-a-txt-file#answer_156297

在 MATLAB Online 中打开

You just have to extend your if-structure:

if ischar(tline) 
 if found
  if strcmpi(tline,'END')
   found=false;
  else
   mydata(end+1,:)=str2num(tline);
  end
 else
  if strcmpi(tline,needle)
   found=true;
  end
 end
end

I cannot test this code right now, but it should at least serve well as starting point. Of course, you have to initialize mydata at the beginning (mydata=[];).