Try using dput when posting (which gives us): dd <- structure(list(X2 = 3:6, Placebo = structure(c(2L, 3L, 4L, 1L ), .Label = c("1000mg/kg", "125mg/kg", "250mg/kg", "500mg/kg" ), class = "factor")), .Names = c("X2", "Placebo"), class = "data.frame", row.names = c("1", "2", "3", "4"))
# assuming dd above try this: library(gtools) mixedsort(dd$Placebo)[1] On Mon, Feb 2, 2009 at 7:42 AM, Ken Knoblauch <ken.knobla...@inserm.fr> wrote: > Ken Knoblauch <ken.knoblauch <at> inserm.fr> writes: > >> >> venkata kirankumar <kiran4u2all <at> gmail.com> writes: >> > I am trying to parse a vector for caliculating minimum in that vector the >> > vector having values like >> > >> > 1 Kontrolle >> > 2 Placebo >> > 3 125mg/kg >> > 4 250mg/kg >> > 5 500mg/kg >> > 6 1000mg/kg >> > hear i tries for comverting it into numeric with using "as.numaric()" >> > function >> > but i got values like >> > 5 >> > 6 >> > 2 >> > 3 >> > 4 >> > 1 >> > >> > can anyone suggest how I will solve it >> > >> > thanks in advance >> > >> > regards; >> > kiran >> > >> Your Kontrolle is being treated as a factor so you >> are seeing only the codes of the levels. There is >> probably something more elegant, but you need >> something like, >> >> as.numeric(sapply(with(dd, strsplit(levels(Placebo)[Placebo], "m")), "[[", >> 1)) >> > I should have specified that when I read in your data, my data frame > looked like this > dd > X2 Placebo > 1 3 125mg/kg > 2 4 250mg/kg > 3 5 500mg/kg > 4 6 1000mg/kg > and > str(dd) > 'data.frame': 4 obs. of 2 variables: > $ X2 : int 3 4 5 6 > $ Placebo: Factor w/ 4 levels "1000mg/kg","125mg/kg",..: 2 3 4 1 > > ______________________________________________ > 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.