[R] character comp

[Rui Barradas]

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
> 
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