Stuffing numbers when converting to characters
format, parsing, r
Solution
`sprintf` with a padding character:
sprintf("%02d",c(1,2,3,45))
You could also use `formatC`, it uses basically the same set of formatting conventions (from the C standard library):
formatC(c(1,2,3,45),flag=0,width=2)
Also, a near-duplicate (sorry, didn't see it before I answered):
Format number as fixed width, with leading zeros
Problem
I need to convert a vector of single digit numbers (e.g. `c(1, 2, 3, 45)`) to a character vector where the length of each item is two, and it is stuffed with a zero before the actual number (e.g. `c("01", "02", "03", "45")`. I could swear that I've done this before in R with some clever function but I can't for the life of me find it or remember what it is... I don't think it's `format()`, but I might be amazed. TL;DR: What function do I need to convert this: ``` c(1, 2, 3, 45) ``` To this: ``` c("01", "02", "03", "45") ``` ?