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

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Shima Asaadi
Shima Asaadi 2016-3-18
评论： Shima Asaadi 2016-3-18
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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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-3-18
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)
  1 个评论
Shima Asaadi
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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