Matching Wildcard Pattern and Character String in R

Question

I am trying to count how many times a keyword appears in a string. In the following variable text, I would like to count how many times keyword appears in text. The result should display 3 because AWAY appears twice and WIN appears once in the string.

text<- "AWAYTEAM IS XXX. I THINK THEAWAYTEAM WILL WIN"
keyword<- c("AWAY","WIN")

Any ideas?

Does this answer your question? [grep using a character vector with multiple patterns](https://stackoverflow.com/questions/7597559/grep-using-a-character-vector-with-multiple-patterns) — user438383, Aug 22 '21 at 16:14

score 2 · Accepted Answer · answered Aug 22 '21 at 18:34

2

We may use str_count with sum

library(stringr)
sum(str_count(text, keyword))
[1] 3

answered Aug 22 '21 at 18:34

akrun

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score 1 · Answer 2 · answered Aug 22 '21 at 16:07

1

One possibility using stringr

library(stringr)

text<- "AWAYTEAM IS XXX. I THINK THEAWAYTEAM WILL WIN"
keyword<- c("AWAY","WIN")

length(unlist(str_extract_all(text, keyword)))
#> [1] 3

^{Created on 2021-08-22 by the reprex package (v2.0.0)}

answered Aug 22 '21 at 16:07

Peter

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Matching Wildcard Pattern and Character String in R

2 Answers2