CODEWITHSUNDEEP
rstringgrepl
Shivpe_R
Shivpe_R

Reputation: 1080

R, String Match or String match combination of strings

I have Set of Strings like "United Kingdom","United States","China","India", And Other String Has to be compared with the set of above strings,And can be combination of multiple values of the set of above strings seperated by "|" .

Like Example:

String1 <- "China"
String2 <- "United States|China"
String3 <- "United States|India|China"
SetoFStrings <- c("United Kingdom","United States","China","India")

So in all Case When Compared String1,String2,String3 with SetofStrings,The Result value has to be true. How can this be done

Upvotes: 1

Views: 119

Answers (1)

akrun
akrun

Reputation: 887168

We can use any with grepl

any(grepl(String1, SetoFStrings))
#[1] TRUE
any(grepl(String2, SetoFStrings))
#[1] TRUE
any(grepl(String3, SetoFStrings))
#[1] TRUE

If the objective is to create the 'String's as in the input post

sapply(dat2$Strings, function(pat) any(grepl(pat, SetoFStrings)))

data

dat1 <- data.frame(Col1 = c('China', 'UnitedStates', 'India'), stringsAsFactors= FALSE)
dat2 <- data.frame(Strings =  Reduce(function(...) paste(..., sep="|"), 
           dat1$Col1, accumulate = TRUE), stringsAsFactors=FALSE)

Upvotes: 1

Related Questions