guangchuang yu 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 >
Wrong syntax. Check the examples of ?switch. If the first argument to switch is not numeric, and does not match the name of any named argument (of which you have none), then the result is the first unnamed argument (i.e. "Hs"). -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
