r - Split a character to letters and numbers

Question

I have a unique character, each letter follows a number. For instance: A1B10C5

I would like to split it into letter <- c(A, B, C) and number <- c(1, 10, 5) using R.

Answer 1

We can use regex lookarounds to split between the letters and numbers

v1 <- strsplit(str1, "(?<=[A-Za-z])(?=[0-9])|(?<=[0-9])(?=[A-Za-z])", perl = TRUE)[[1]]
v1[c(TRUE, FALSE)]
#[1] "A" "B" "C"

as.numeric(v1[c(FALSE, TRUE)])
#[1]  1 10  5

data

str1 <- "A1B10C5"