R-FAQ 7.31 Berend
On 07-02-2013, at 17:41, "J. Braeken" <j.brae...@uvt.nl> wrote: > Dear R-list, > > > We stumbled upon some weird problem when performing a simple indexing > operation. > Below some example code to illustrate the issue > > #FAILS TO FIND .55 Oo > huh1 = seq(.1,.7,.15);huh1 > # [1] 0.10 0.25 0.40 0.55 0.70 > huh1 == .25 > # [1] FALSE TRUE FALSE FALSE FALSE > huh1 == .55 > # [1] FALSE FALSE FALSE FALSE FALSE > huh1 == "0.55" > # [1] FALSE FALSE FALSE TRUE FALSE > > Hence somehow one element in the sequence has become a character? > > #DOES NOT FAIL TO FIND .55 > huh2 = c(.1,.25,.4,.55,.7);huh3 > # [1] 0.10 0.25 0.40 0.55 0.70 > huh2 == .25 > # FALSE TRUE FALSE FALSE FALSE > huh2 == .55 > # [1] FALSE FALSE FALSE TRUE FALSE > > This is what you would expect. > > #DOES NOT FAIL TO FIND .55 > huh3 = seq(.1,.7,.05);huh2 > # [1] 0.10 0.25 0.40 0.55 0.70 > huh3 == .25 > # [1] FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE > FALSE > huh3 == .55 > # [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE > FALSE > > Strangely when making a longer sequence, the weird behavior does not persist. > > > Does anyone have a clue what is going on here? > > > _ > platform i386-pc-mingw32 > version.string R version 2.12.1 (2010-12-16) > > > Best regards, > > > Johan > > ______________________________________________ > 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.