Regular Expressions using regexp
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Hello, I have some problem with understanding regexp expression
I have some names: ["T_24_UZK500.txt"; "FWD_T80_UZK500.txt"; "T80_UZK700.txt"]
how can I get numbers after "T" and after "UZK"?
I need a rule that will describe only the numbers after the designated patterns.
2 个评论
Adam Danz
2019-5-10
Are "T" and "UZK" the only possible letters in the names?
Eduard Mazur
2019-5-10
编辑：Eduard Mazur
2019-5-10
采纳的回答
Matching only integer numbers after 'UZK' or 'T_' (it is unclear in your question if the underscore is permitted or not, but the regular expression below is easy to adapt):
>> S = {'T_24_UZK500.txt';'FWD_T80_UZK500.txt';'T80_UZK700.txt'};
>> C = regexp(S,'(?<=(T_?|UZK))\d+','match');
>> C{:}
ans =
'24' '500'
ans =
'80' '500'
ans =
'80' '700'
Or simply by matching any integer numbers:
>> C = regexp(S,'\d+','match');
>> C{:}
ans =
'24' '500'
ans =
'80' '500'
ans =
'80' '700'
4 个评论
Eduard Mazur
2019-5-10
编辑：Eduard Mazur
2019-5-10
Small change from Stephen's solution: here you can list the potential patterns and the expression will be created according to your list. Also, underscores are removed ahead of time.
S = {'T_24_UZK500.txt';'FWD_T80_UZK500.txt';'T80_UZK700.txt'};
patterns = {'T', 'UZK'};
exp = ['(?<=(', strjoin(patterns,'|') ,'))\d+'];
% Remove all underscores (if any)
S = strrep(S, '_', '');
C = regexp(S, exp, 'match'); % use regexpi() to ignore case
Eduard Mazur
2019-5-10
madhan ravi
2019-5-10
Using exp as a variable name is not a good idea it would thwart the inbuilt function exp()
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