Hello,
It should be
nchar(mydataframe[,2])-nchar(mydataframe[,3])
since the first column is ID.
Hope this helps,
Rui Barradas
Às 18:31 de 09/02/2019, Erin Hodgess escreveu:
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
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--
Erin Hodgess, PhD
mailto: erinm.hodg...@gmail.com
______________________________________________
R-help@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.
