CODEWITHSUNDEEP
r
srb633
srb633

Reputation: 813

Identify if character string contains any numbers?

I've been trying to word this title for 5 minutes to avoid it being a similarly phrased question. No luck, so apologies if this has already been discussed. I couldn't find any other threads on this particular subject.

Simply put, I want to identify if numbers exist in a class character string. If true apply further functions.

Here's a dodgy attempt.

x <- "900 years old"

if(str_detect(x, ">=0")) {

print("contains numbers")
}

So obviously the problem is that I'm trying to use relational operators within a character string. Considering it's of this class, how can i identify numeric characters?

Upvotes: 1

Views: 1409

Answers (2)

akrun
akrun

Reputation: 886948

With base R, we can use grepl

grepl('[0-9]', x)

Upvotes: 3

Gregor Thomas
Gregor Thomas

Reputation: 145755

[0-9] is a regex pattern for numbers 0 to 9. You could also use special patterns \d or [:digit:] (for digits). In R, you have to add extra escapes to the special patterns. All of these should work:

str_detect(x, "[0-9]")
str_detect(x, "\\d")
str_detect(x, "[[:digit:]]")

Upvotes: 6

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