Remove all characters before a period in a string

Question

This keeps everything before a period:

gsub(\"\\\\..*\",\"\", data$column )

how to keep everything after the period?

Answer 1

You could use stringi with lookbehind regex

 library(stringi)
 stri_extract_first_regex(data1, "(?<=\\.).*")
 #[1] "bar.barfoo"
 stri_extract_first_regex(data, "(?<=\\.).*")
 #[1] "barfoo"

If the string doesn't have ., this retuns NA (it is not clear about how to deal with this in the question)

 stri_extract_first_regex(data2, "(?<=\\.).*")
 #[1] NA

###data
data <- 'foobar.barfoo' 
data1 <- 'foo.bar.barfoo'
data2 <- "foobar"