character comp

Hello,

The following will do it.

mydataframe$dvar <- c(sapply(mydataframe[-1], nchar) %*% c(1, -1))

Hope this helps,

Rui Barradas

?s 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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character comp

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