search for: ct3a

...0, replace= TRUE) # the number of variables run to end of coulmn 20000 mydf <- data.frame(SN, CT1, CT2, CT3) First question: how can I split 12 into 1 2, 13 into 1 3, 14 into 1 4? What I am trying here is to split each number into two and make seperate variable CT1a and CT1b, CT2a and CT2b, CT3a and CT3b. Tried with strsplit () but I believe this works with characters only Q2 Is there any function that works in the same manner as find and replace function MS excel. Just for example, if I want to replace all 1s in the above data frame with "A", 2 with "B". Thus the nu...