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Seek a Match for the Pattern in the String in R Programming – pmatch() Function

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pmatch() function in R Language is used to seek match for the pattern passed as argument. It returns the strings that begin with the pattern being searched.
Syntax: pmatch(pat, string, nomatch) Parameters: pat: pattern vector to be searched string: vector to be matched nomatch: return when no match is found
Example 1:
# R Program to match pattern in a string
  
# Creating string vector
x <- c("Geeks", "Books", "geek")
x
  
# Matching pattern
pmatch("gee", x) 
pmatch("Boo", x)

                    
Output:
[1] "Geeks" "Books" "geek" 
[1] 3
[1] 2
Example 2:
# R Program to match pattern in a string
  
# Creating string vector
x <- c("Geeks", "Books", "geek")
x
  
# Matching pattern
pmatch(c("Gee", "Boo", "re"), x, nomatch = -1

                    
Output:
[1] "Geeks" "Books" "geek" 
[1]  1  2 -1

Last Updated : 16 Jun, 2020
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