Hi r-help-boun...@r-project.org napsal dne 09.11.2010 20:25:09:
> casperyc <caspe...@hotmail.co.uk> > Odeslal: r-help-boun...@r-project.org > > 09.11.2010 20:25 > > Re: [R] how do i plot this "hist"? > > > Hi all, > > Thank you both. The codes work perfectly. > > I now use > > barplot(t(x.m)[-1,], names.arg = x.m[,1]) > > to make the 'histogram' plot. > > Now how do I add a dentity line to it? > like 'superpose' on the graph? > say if I got a Normal with mean 100 and variance 3... see ?lines and ?density > > And I can work out the mean and variance > through their definition, multiple the 'values' and the 'frequencies', > sum them up and then devid by the total number, ect... > > Is there any codes that can deal with these count data? > so that I can tell R, ''x.m[,1]" is the frequency and work out the mean, sd, > ect...straightforward? maybe mean(rep(x.m[,1], x.m[,2]) var(rep(x.m[,1], x.m[,2]) Regards Petr > > Thanks! > > casper > > > -- > View this message in context: http://r.789695.n4.nabble.com/how-do-i-plot- > this-hist-tp3032796p3034959.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.