[R] character comp

[Erin Hodgess]

Will it always be A’s or will there be a mix please?

On Sat, Feb 9, 2019 at 11:06 AM Val <valkremk using 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
>
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-- 
Erin Hodgess, PhD
mailto: erinm.hodgess using gmail.com

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