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

Last Updated : 15 Jul, 2025
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: Python3 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: Python3 1== 
# 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
Comment
Article Tags:
R Language
R String-Functions

Explore