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فيديو شرح Regular Expressions in R language (With Examples) ضمن كورس لغة R شرح قناة Unboxing Big Data، الفديو رقم 18 مجانى معتمد اونلاين
Here is the list of expressions:
1. . Matches Any Character
2. \d Digit (0–9)
3. \D Not a digit (0–9)
4. \w Word Character (a-z, A-Z, 0–9, _)
5. \W Not a word character
6. \s White space (space, tab, newline)
7. \S Not white space (space, tab, newline)
8. \b Word Boundary
9. \B Not a word boundary
10. ^ Beginning of a string
11. $ End of a String
12. [] matches characters or brackets
13. [^ ] matches characters Not in brackets
14. Either Or
15. ( ) Group
16. 0 or more
17. + 1 or more
18. ? Yes or No
19. {x} Exact Number
20. {x, y} Range of Numbers (Maximum, Minimum)