Thanks a lot Petr ! shall i uses "dodge" also for the RELATIVE FREQUENCY HISTOGRAMS :
p <- ggplot(iris, aes(x=Sepal.Length, y=..count../sum(..count..)*100, colour=Species)) p+geom_histogram(position="dodge") or is there any other way to display the RELATIVE FREQUENCY HISTOGRAMS ? thanks again ! On Wed, Feb 24, 2021 at 11:00 PM PIKAL Petr <petr.pi...@precheza.cz> wrote: > Hi > > You should use position dodge. > > p <- ggplot(iris, aes(x=Sepal.Length, colour=Species)) > p+geom_density() > p <- ggplot(iris, aes(x=Sepal.Length, y=..density.., colour=Species)) > p+geom_histogram(position="dodge") > > Cheers > Petr > > -----Original Message----- > > From: R-help <r-help-boun...@r-project.org> On Behalf Of Bogdan Tanasa > > Sent: Wednesday, February 24, 2021 11:07 PM > > To: r-help <r-help@r-project.org> > > Subject: [R] overlaying frequency histograms or density plots in R > > > > Dear all, we do have a dataframe with a FACTOR called EXP that has 3 > LEVELS ; > > > > head(pp_ALL) > > VALUE EXP > > 1 1639742 DMSO > > 2 1636822 DMSO > > 3 1634202 DMSO > > > > shall i aim to overlay the relative frequency histograms, or the density > > histograms for the FACTOR LEVELS, > > > > please would you let me know why the following 2 pieces of R code show > > very different results : > > > > ggplot(pp_ALL, aes(x=VALUE, colour=EXP)) + geom_density() > > > > versus > > > > ggplot(data=pp_ALL) + > > geom_histogram(mapping=aes(x=VALUE, y=..density.., colour=EXP), > > bins=1000) > > > > thanks, > > > > bogdan > > > > ps : perhaps i shall email to the folks on ggplot2 mailing list too ... > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
