[R] Remove

[David Winsemius]

> On Dec 6, 2017, at 3:15 PM, Ashta <sewashm at gmail.com> wrote:
> 
> Hi all,
> In a data set I have group(GR) and two variables   x and y. I want to
> remove a  group that have  the same record for the x variable in each
> row.
> 
> DM <- read.table( text='GR x y
> A 25 125
> A 23 135
> A 14 145
> A 12 230
> B 25 321
> B 25 512
> B 25 123
> B 25 451
> C 11 521
> C 14 235
> C 15 258
> C 10 654',header = TRUE, stringsAsFactors = FALSE)
> 
> In this example the output should contain group A and C  as group B
> has   the same record  for the variable x .
> 
> The result will be
> A 25 125
> A 23 135
> A 14 145
> A 12 230
> C 11 521
> C 14 235
> C 15 258
> C 10 654

Try:

DM[ !duplicated(DM$x) , ]
> 
> How do I do it R?
> Thank you.
> 
> ______________________________________________
> R-help at 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.

David Winsemius
Alameda, CA, USA

'Any technology distinguishable from magic is insufficiently advanced.'   -Gehm's Corollary to Clarke's Third Law