Reading a *.txt document and extracting specific words/phrases

Question

Shima Asaadi 2016-3-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/274202-reading-a-txt-document-and-extracting-specific-words-phrases

评论： Shima Asaadi 2016-3-18

13.40.05-15087.txt

I have a *.txt document file and I would like to extract the words/phrases that I know the start and end character number of them in that document.

For example the word's start and end char number is : 711,724. I tried to match them using the following MATLAB code:

    filetoread ='document file path';
    fid = fopen(filetoread)
    x=zeros(1,1);
    while 1
      tline = fgetl(fid);
      if ~ischar(tline), break, end
      x = [x , tline];
    end
    x(1, 711:724)

In the code I try to save the whole document in a matrix x and printing the columns between 711 and 724. But it does not match the words correctly. I think the problem is with whitespaces,empty lines,...

(I attached a sample document)

I would appreciate any help,

Many thanks

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Answer 1

Azzi Abdelmalek 2016-3-18

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/274202-reading-a-txt-document-and-extracting-specific-words-phrases#answer_214097

在 MATLAB Online 中打开

filetoread ='yourfile.txt';
  fid = fopen(filetoread)
  k=1;
  v=cell(1,1)
  while 1
    tline = fgetl(fid);
    if ~ischar(tline), break, end
   v{k,1}=tline
    k=k+1
  end
  a=cellfun(@(x) strtrim(x),v,'un',0)
  a(cellfun(@isempty,a) )=[]
  out=cellfun(@(x) x(10:20),a,'un',0)

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Shima Asaadi 2016-3-18

Thank you very much for answer.

In this case each paragraph is considered separately, though considering empty lines. for example the word with start/end char numbers of "570,590" in the original document can not be extracted in this way. Because it is in a paragraph that starts from first to the length of the paragraph. How can I modify the code to take the whole documents at once?

Thank you for your help

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