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ϥΤWPrƦƬSŸAڭ̥iHqruI like Chapter 2, Chapter 10, and Chapter 25 of this book!vXuChapter 2vBuChapter 10vAHΡuChapter 25vAШUCdҡG
Example 1: 04-qιB⦡/regExp08.m string = 'I like Chapter 2, Chapter 10, and Chapter 25 of this book!';
pattern = 'Chapter [1-9][0-9]?';
[start, finish] = regexp(string, pattern);
fprintf('Matched substrings:\n');
for i=1:length(start)
fprintf('\t%d: %s\n', i, string(start(i):finish(i)));
end Matched substrings:
1: Chapter 2
2: Chapter 10
3: Chapter 25
YnXHΥdXAiUCdҡG
Example 2: 04-qιB⦡/regExp12.m string = 'My credit number is "1234-5678-9012-3456".';
pattern = '\d{4}-\d{4}-\d{4}-\d{4}';
[start, finish] = regexp(string, pattern);
fprintf('Matched substrings:\n');
for i=1:length(start)
fprintf('\t%d: %s\n', i, string(start(i):finish(i)));
end Matched substrings:
1: 1234-5678-9012-3456
pGn鶴ҦrAiΤUCdҡG
Example 3: 04-qιB⦡/regExp05.m string = 'My Id number is F123765431';
pattern = '[A-Z]\d{9}';
start = regexp(string, pattern) start =
17
^ǵGN F123765431 b string ܼƪ}lmCbWzdҤA [A-Z] N A Z Ҧi^rA\d N 0 9 ƥئr]ƹW]iHg [0-9]^A{9} hNݭnEӼƥئrA] u[A-Z]\d{9}v NNiH鶴ҦrqΦC
Hint ƹWAҦrNbsXWhAodzWhMϥΪ̪ʧOA٥]t@ˬdXAëD²²aѤ@ӭ^r[WEӼƦrҺcCҦrsXWhAiHbjM]Ҧp www.google.com^WdܦhC
Ynb@ӦrꤤAXub b P t GΤTӥlrvAiUCdҡG
Example 4: 04-qιB⦡/regExp09.m string = 'bt bat bet ban bit boat beet berp boaet baeiout';
pattern = 'b[aeiou]{2,3}t';
[start, finish] = regexp(string, pattern);
fprintf('Matched substrings:\n');
for i=1:length(start)
fprintf('\t%d: %s\n', i, string(start(i):finish(i)));
end Matched substrings:
1: boat
2: beet
3: boaet
ڭ̤]iHQΤpAi歫ƦrꪺCҦpe쪺HΥdXAqΦiHgu\d{4}-\d{4}-\d{4}-\d{4}vA]iHQΤpAgu(\d{4}-){3}\d{4}v]\d{4}- ƤTAA[W \d{4}^AШUCdҡG
Example 5: 04-qιB⦡/regExp18.m string = 'Two cards: 1234-5678-9012-3456 and 0987-6543-2109-8765';
pattern = '(\d{4}-){3}\d{4}';
[start, finish] = regexp(string, pattern);
fprintf('Matched substrings:\n');
for i=1:length(start)
fprintf('\t%d: %s\n', i, string(start(i):finish(i)));
end Matched substrings:
1: 1234-5678-9012-3456
2: 0987-6543-2109-8765
SOn`NOAbqΦL{AұĥΪkOṳj]Maximal Match^άOvugߤv]Greedy Match^A]|ɶqugvVhrVnAҦpAYϥγqΦ 'foo.*bar' Ӥr 'The food is under the bar in the barn.'AҤ쪺Or food is under the bar in the barAӤOt@ӲŦXзǪur food is under the barCYnϳqΦi淥p]Minimal Match^A]NObŦX諸UA̵ܳurANnbP[WݸAШUCdҡG
Example 6: 04-qιB⦡/regExp19.m string = 'The food is under the bar in the barn.';
pattern1 = 'foo.*bar';
[start, finish] = regexp(string, pattern1);
fprintf('\tGreedy match: %s\n', string(start:finish));
pattern2 = 'foo.*?bar';
[start, finish] = regexp(string, pattern2);
fprintf('\tMinimal match: %s\n', string(start:finish)); Greedy match: food is under the bar in the bar
Minimal match: food is under the bar
Hint UŪ̥iHo{AݸbqΦNqOMWU]Context Dependent^AiHpӻG
pGݸb@rANue@ӦrsΤ@vC pGݸbPΥ[ANupvC
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