i have a vector > start [1] 4 5 6 NA i want to replace NA by 1 but that didnot work gsub(NA, 1, as.character(start), ignore.case = T) -- shan gao Room 231(Dr.Fei lab) Boyce Thompson Institute Cornell University Tower Road, Ithaca, NY 14853-1801 Office phone: 1-607-254-1267(day) Official email:sg839 at cornell.edu Facebook:http://www.facebook.com/profile.php?id=100001986532253

On Thu, Jan 19, 2012 at 10:31 PM, wang peter <wng.peter at="" gmail.com=""> wrote: > i have a vector >> start > [1] ?4 ?5 ?6 NA > i want to replace NA by 1 > > but that didnot work > gsub(NA, 1, as.character(start), ignore.case = T) start[is.na(start)]=1