lettersPattern
Match letter characters
Description
pat = lettersPatternlettersPattern accepts
letter characters as defined by the Unicode standard.
pat = lettersPattern(minCharacters,maxCharacters)minCharacters and less than or equal to
maxCharacters. inf is a valid value for
maxLetter. lettersPattern is
greedy and matches a number of letters as close to
maxCharacters as possible.
Examples
Use lettersPattern to extract words from a string containing letters, numbers, white spaces, and punctuation.
Create txt as a string. Create pat as a pattern object that matches letters using lettersPattern. Extract the pattern from txt.
txt = "The 2 parties agreed. The meeting would occur at 1 PM.";
pat = lettersPattern;
words = extract(txt,pat)words = 9×1 string
"The"
"parties"
"agreed"
"The"
"meeting"
"would"
"occur"
"at"
"PM"
Use lettersPattern to count the occurrences of individual letters in a line of text.
Create txt as a string. Create pat as a pattern object that matches individual letters using lettersPattern. Extract the pattern. Display a histogram of the number of occurrences of each letter.
txt = "What are the letters in this sentence?";
pat = lettersPattern(1);
letters = extract(txt,pat);
letters = categorical(letters);
histogram(letters)
Use lettersPattern to exclude words with more than five letters.
Create pat as a pattern that matches groups of five or more letters using lettersPattern. Extract the pattern.
txt = "Some of these words are longer than others.";
pat = lettersPattern(5,inf);
extract(txt,pat)ans = 4×1 string
"these"
"words"
"longer"
"others"
Input Arguments
Output Arguments
Extended Capabilities
Version History
Introduced in R2020b
