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alphanumericsPattern

Match letter and digit characters

Description

example

pat = alphanumericsPattern creates a pattern that matches text composed of one or more of letter and digit characters. alphanumericsPattern is Unicode tolerant.

example

pat = alphanumericsPattern(N) matches exactly N letter or digit characters.

example

pat = alphanumericsPattern(minCharacters,maxCharacters) matches text composed of at least minCharacters and at most maxCharacters characters. inf is a valid value for maxCharacters. alphanumericsPattern is greedy and matches a number of letter and digit characters as close to maxCharacters as possible.

Examples

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Use alphanumericPattern to extract letters and digits from text.

Create txt as a string. Create pat as a pattern object that matches letters and digits using alphanumericPattern. Extract the pattern from txt.

txt = "abc 123 =+-*/";
pat = alphanumericsPattern;
alphanumerics = extract(txt,pat)
alphanumerics = 2x1 string
    "abc"
    "123"

Create txt as a string. Create pat as a pattern object that matches groups of three letters and numbers using alphanumericPattern. Extract the pattern from txt.

txt = "abcde123456_@#$";
pat = alphanumericsPattern(3);
alphanumerics = extract(txt,pat)
alphanumerics = 3x1 string
    "abc"
    "de1"
    "234"

Use alphanumericsPattern to match sets of letters and digits with a size that falls into specified range.

Create txt as a string. Create pat as a pattern object that matches groups of two to four letters and numbers using alphanumericPattern. Extract the pattern from txt.

txt = "12345ABCDE";
pat = alphanumericsPattern(2,4);

alphanumerics = extract(txt,pat)
alphanumerics = 3x1 string
    "1234"
    "5ABC"
    "DE"

Input Arguments

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Number of characters to match, specified as a nonnegative integer scalar.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Minimum number of characters to match, specified as a nonnegative integer scalar.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Maximum number of characters to match, specified as a nonnegative integer scalar.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

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Pattern expression, returned as a pattern object.

Introduced in R2020b