CODEWITHSUNDEEP
r
Mike S
Mike S

Reputation: 306

R wild single character in replace sub

how I can refer to any single character in R>? in my case it would be 3 any chars. I bit overwhelmed with its power, so many help around !) In my case I need to replace any 3 characters in pos 25-27 with "XXX". I successfully used this code to replace specific chars, tried to use %,* instead of abc with no avail. Tx much

d <- c("alpha 1 bravo 0 charlie_abc v3")
sub("^(.{24})abc", "\\1XXX", d)
   [1] "alpha 1 bravo 0 charlie_XXX v3"

Upvotes: 0

Views: 37

Answers (1)

mt1022
mt1022

Reputation: 17299

Here are two ways, using pattern "^(.{24}).{3}" or using substring :

d <- c("alpha 1 bravo 0 charlie_abc v3")
sub("^(.{24}).{3}", "\\1XXX", d)
#> [1] "alpha 1 bravo 0 charlie_XXX v3"

d <- c("alpha 1 bravo 0 charlie_abc v3")
substring(d, 25, 27) <- "XXX"
d
#> [1] "alpha 1 bravo 0 charlie_XXX v3"

Upvotes: 3

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