Extracting numbers from vectors of strings

Question

I have string like this:

years<-c(\"20 years old\", \"1 years old\")

I would like to grep only the numeric number from this vector. Expe

Answer 1

Using the package unglue we can do :

# install.packages("unglue")
library(unglue)

years<-c("20 years old", "1 years old")
unglue_vec(years, "{x} years old", convert = TRUE)
#> [1] 20  1

^{Created on 2019-11-06 by the reprex package (v0.3.0)}

More info: https://github.com/moodymudskipper/unglue/blob/master/README.md