Ok. Try something like nchar(mydataframe[,1])-nchar(mydataframe[,2])
On Sat, Feb 9, 2019 at 11:21 AM Erin Hodgess <erinm.hodg...@gmail.com> wrote: > Will it always be A’s or will there be a mix please? > > On Sat, Feb 9, 2019 at 11:06 AM Val <valkr...@gmail.com> wrote: > >> Hi All, >> In a given data frame I want to compare character values of two columns. >> My sample data looks like as follow, >> >> mydataframe <- read.table( text='ID var1 var2 >> R1 AA AAA >> R2 AAA AAA >> R3 A AAAA >> R4 AA A >> R5 A AAA', header = TRUE, as.is = TRUE ) >> >> For each ID, I want create the third column "dvar" as difference >> between var1 and var2 >> Row1( R1) the "dvar" value will be -1 and the complete desired out >> put looks like as follow. >> >> ID var1 var2 dvar >> R1 AA AAA -1 >> R2 AAA AAA 0 >> R3 A AAAA -3 >> R4 AA A 1 >> R5 A AAA -2 >> >> How do i do this? Any help please? >> Thank you >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > -- > Erin Hodgess, PhD > mailto: erinm.hodg...@gmail.com > -- Erin Hodgess, PhD mailto: erinm.hodg...@gmail.com [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
