search for keywords in text file

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narges
narges 2018-6-27
评论： narges 2018-6-27
hi there I want to do search in TEST.txt, for 'Area' and 'class' keywords. if both exist display 'yes'. could you plz help me about that?
my code:
filetext = fileread('TEST.txt');
expr1 = '[^\n]*[Aa]rea[^\n]*';
matchstr = regexp(filetext,expr1,'match');
expr2 = '[^\n]*[Cc]lass[^\n]*';
matchstr = regexp(filetext,expr2,'match');
if matchstr(filetext,expr1)&& matchstr(filetext,expr2)
disp (yes)
end
error: Index in position 1 exceeds array bounds.

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采纳的回答

Guillaume
Guillaume 2018-6-27
  • You're overwriting your matchstring variable in the second regexp call, losing the result of the first call.
  • your matchstr(fileext, expr1) is complete nonsense. It is trying to index a scalar logical with two char arrays.
The correct expression would be:
if regexp(filetext,expr1,'match') & regexp(filetext,expr2,'match')
disp('yes');
end
It is puzzling how you could come up with the regular expressions but then write complete nonsense code.
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Paolo
Paolo 2018-6-27
编辑：Paolo 2018-6-27
@narges You can also use regexpi instead of regexp for case insensitivity.
narges
narges 2018-6-27
much better. thanks a lot :)

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