Re: [R] Substring and extract a certain number of characters

Try: s1 - hello.world s2 - c(GLEm0045, GLEn0042, GLEz0048)  substr(s1,1,5) #or gsub(\\..*,,s1) n - 5 substr(s2,nchar(s2)-n +1,nchar(s2)) A.K. If I have a column that has hello.world  how   could I extract hello?  In addition in a column how can I extract the last 5 characters?    For

Re: [R] Substring and extract a certain number of characters

Also, library(stringr) str_sub(s2,-5,-1) str_extract(s1,[[:alpha:]]+) A.K. On Thursday, November 14, 2013 10:50 AM, arun smartpink...@yahoo.com wrote: Try: s1 - hello.world s2 - c(GLEm0045, GLEn0042, GLEz0048)  substr(s1,1,5) #or gsub(\\..*,,s1) n - 5 substr(s2,nchar(s2)-n +1,nchar(s2))