This isn't a bug in R. You are assigning within the switch statement, and it is returning the first TRUE value (human).
Use "=" not "<-" species <- switch(organism, human="HS", fly="DM", yeast="SC") > species [1] "SC" HTH Jeff On Mon, Mar 9, 2009 at 8:55 AM, guangchuang yu <guangchuan...@gmail.com> wrote: > Hi, > > When I call the *switch* function first time, it works. but when I call it > at the second time, it does nothing. The version I use is R version 2.9.0 > Under development (unstable) (2009-02-21 r47969) > > > here is the output: > >> organism="human" >> species <- switch(organism, > human <- "Hs", > fly <- "Dm", > mouse <- "Mm", > rat <- "Rn", > yeast <- "Sc" > ) > species <- switch(organism, > + human <- "Hs", > + fly <- "Dm", > + mouse <- "Mm", > + rat <- "Rn", > + yeast <- "Sc" > + ) >> species > [1] "Hs" >> organism="yeast" >> species <- switch(organism, > human <- "Hs", > fly <- "Dm", > mouse <- "Mm", > rat <- "Rn", > yeast <- "Sc" > ) > species <- switch(organism, > + human <- "Hs", > + fly <- "Dm", > + mouse <- "Mm", > + rat <- "Rn", > + yeast <- "Sc" > + ) >> species > [1] "Hs" > > > when I change *organism* to "yeast", and call *switch* function again, > *species* suppose to be changed to "Sc", but it remain it's original value. > > You can see my screenshot at > http://ygc.azpala.com/2009/03/09/bug-of-r-29-dev > > -- > Bests, > Guangchuang Yu > > --~--~---------~--~----~------------~-------~--~----~ > Rm 848 Dept 9 > Institute of Radiation Medicine > 27 Taiping Rd. Haidian Dist. > Beijing, 100850, China > Telephone: (86)-010-66931422 > Mobile: +86-13439009806 > Email: guangchuan...@gmail.com > -~----------~----~----~----~------~----~------~--~--- > > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Jeffrey Ryan jeffrey.r...@insightalgo.com ia: insight algorithmics www.insightalgo.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
