This is mentioned on page 70 of 'The R Inferno'. On 20/08/2010 22:38, ivo welch wrote:
Dear R experts: this is probably correct behavior, but I do want to point out that it is unexpected to someone not too well versed:test=factor("A","B","C","A") ifelse(test=="A", as.factor("A"), test)[1] 1 2 3 1 ok, my factor was just coerced into integers, even though I have a logical vector as my condition and factors as my true and false values. this means thattest[1:3]=ifelse(test[1:3]=="A", rep(as.factor("A"),3), test[1:3])won't work. I do know how to program around this, but since it stumped me for a while (in a more complex program, of course), I thought I would drop this note. regards, /iaw ---- Ivo Welch (ivo.we...@brown.edu, ivo.we...@gmail.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.
-- Patrick Burns pbu...@pburns.seanet.com http://www.burns-stat.com (home of 'Some hints for the R beginner' and 'The R Inferno') ______________________________________________ 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.
