But Why ? Why can not use "<-" ?
On Mon, Mar 9, 2009 at 10:31 PM, Jeff Ryan <jeff.a.r...@gmail.com> wrote: > 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 > -- 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
