[R] character comp

[Erin Hodgess]

Nice, Rui!  Thanks

On Sat, Feb 9, 2019 at 11:55 AM Rui Barradas <ruipbarradas using sapo.pt> wrote:

> Hello,
>
> The following will do it.
>
> mydataframe$dvar <- c(sapply(mydataframe[-1], nchar) %*% c(1, -1))
>
>
> Hope this helps,
>
> Rui Barradas
>
> Às 18:05 de 09/02/2019, Val escreveu:
> > 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 using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
> ______________________________________________
> R-help using 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.hodgess using gmail.com

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