Extract last 3 characters from numeric vector
You can use nchar() to get the length of the string, and use that in substring: mynum <- as.character(15.6)
substring(mynum, nchar(mynum)-2, nchar(mynum))
[1] "5.6"
On Sun, Dec 4, 2011 at 8:38 AM, Kang Min <ngokangmin at gmail.com> wrote:
Hi all, I have a numeric vector with 1 decimal place, and I'd like to extract the last 3 characters, including the decimal point. The vector ranges from 0 to 20. x <- round(runif(100)*20, digits=1) Some of numbers have 3 characters, and some have 4. I've read up on the substr() function but that extracts characters based on exact positions. How can I extract just the last 3 characters no matter the length of the number? e.g. from 16.7 I want 6.7, from 3.5 I want 3.5 as it is. Thanks, Kang Min
Sarah Goslee http://www.functionaldiversity.org