?ifelse
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
Marcel Curlin <cemar...@u.washington.edu> wrote:
>I spent some time on this simple question, also searched the forum,
>eventually hacked my way to an ugly solution for my particular problem
>but I
>would like to improve my coding:
>
>I have data of the form:
>df <- expand.grid(group=c('copper', 'zinc', 'aluminum', 'nickel'),
>condition1=c(1:4))
>
>I would like to add a new data column "condition2", with values equal
>to the
>value of condition1 plus a random number from 0-1 (uniform
>distribution) if
>the value of condition1 is < 1, or just condition1 if the value of
>condition1 is > 1. More generally, my interest is in manipulating the
>values
>of condition1 if they meet one or more criteria, or keeping the values
>the
>same otherwise. Thanks for any thoughts!
>
>
>
>
>
>--
>View this message in context:
>http://r.789695.n4.nabble.com/Performing-operations-only-on-selected-data-tp4650646.html
>Sent from the R help mailing list archive at Nabble.com.
>
>______________________________________________
>R-help@r-project.org mailing list
>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.
______________________________________________
R-help@r-project.org mailing list
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.
