Hello, What you are doing wrong? Correctly read the help page.
>From the help page: "if FALSE, probability densities, component density, are plotted (so that the histogram has a *total area of one*)" > sum(check$density * diff(check$breaks)) [1] 1 HTH, Pascal On Tue, May 20, 2014 at 3:06 PM, vikram ranga <babuaw...@gmail.com> wrote: > Dear List, > > I am trying to make a histogram with following data: > > dput(a) > c(1, 0, 1.5, 1, 0, 0, 0, 1, 1.5, 0, 0, 1, 0, 0, 0, 1, 1, 2, 1, > 0, 0, 0, 1, 1, 1, 0, 1, 0.5, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, > 0, 0, 0, 0, 1, 1, 1, 0, 0, 1.5, 0, 0, 0, 0, 1, 0, 0, 0.5, 0, > 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 2, 0, 0, 0, 1, 1, 0, > 0, 0, 1.5) > > So, I did > > hist(a, freq = FALSE, breaks = 5) > but the first bar height is going above 1! > I did some checking > > check <- hist(a, freq = FALSE, breaks = 5) > check$density > > #[1] 1.146341 0.707317 0.097561 0.048780 > > first bar went above 1, however, the values should be > check$counts/length(a) > #[1] 0.57317 0.35366 0.04878 0.02439 > sum(check$counts/length(a)) > #[1] 1 > > > What am I going wrong here? > > Thank you for your time! > > Regards, > > Vikram. > > sessionInfo() > > R version 3.1.0 (2014-04-10) > Platform: i386-w64-mingw32/i386 (32-bit) > > locale: > [1] LC_COLLATE=English_India.1252 LC_CTYPE=English_India.1252 > LC_MONETARY=English_India.1252 > [4] LC_NUMERIC=C LC_TIME=English_India.1252 > . > . > . > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. -- Pascal Oettli Project Scientist JAMSTEC Yokohama, Japan ______________________________________________ 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.