How to replace a particular string in text file

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arun
arun 2013-10-18
评论： Cedric 2013-10-19
I have a problem related to efficiency, the code given below will replace the string and with '' an ' .' the code is working properly for small size text file ,but the main problem i am facing is that if there are approx 40,0000+ lines in text file then it is taking too much time that no one can't wait so please can anyone suggest me something different which run faster than this, Thanks in advance.
fid = fopen('input.txt','r');
f=fread(fid,'*char')';
fclose(fid);
f = regexprep(f,' ','');
f = regexprep(f,' ',' .');
fid = fopen('output.txt','w');
fprintf(fid,'%s',f);
fclose(fid);

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Azzi Abdelmalek
Azzi Abdelmalek 2013-10-18
编辑：Azzi Abdelmalek 2013-10-18
strrep is faster then regexprep
f = strrep(f,' ','');
f = strrep(f,' ',' .');
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arun
arun 2013-10-19
yes, now i am using
f = regexp(f,'\S*_','split')
To get the following output,
VBD JJ IN VBN NN VB DT NN
VBD JJ IN VBN NN VB DT NN
These statement are much better.
Thanks for your efforts and for your valuable suggestions.

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