Hi
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
> project.org] On Behalf Of Ben Bolker
> Sent: Wednesday, September 11, 2013 3:46 PM
> To: r-h...@stat.math.ethz.ch
> Subject: Re: [R] superpose violin and boxplot in ggplot
>
> PIKAL Petr <petr.pikal <at> precheza.cz> writes:
>
> >
> > Dear all
> >
> > I am struggling a bit with tricky violinplot. I found how to
> superpose
> boxplots correctly to violinplots.
> >
> > p<-ggplot(Cars93, aes(x=Origin, y=Price, fill=Type, colour=Type))
>
> [snip]
> >
> > How I could change colour of boxplots to single colour but get the
> > boxes at the correct locations e.g. over violins.
> >
> > Thanks
> > Petr
> >
> >
>
> Use the group() aesthetic:
>
> p+geom_violin()+
> p+geom_boxplot(aes(fill=NULL,group=interaction(Type,Origin)),
> position=position_dodge(width=.9), width=.5, colour="black")
Thanks. In the meantime I found another solution using scale_colour_manual.
p+geom_violin()+geom_boxplot(aes(fill=NULL),
position=position_dodge(width=.9),
width=.5)+scale_colour_manual(values=rep("black", 6))
Your solution seems to be better as the legend looks slightly better.
>
> By the way, it would be useful to remind us that Cars93 is available in
> the MASS package -- I had to hunt around a little bit.
Sorry for that. I forgot to add it to my question together with ggplot2 package.
Regards
Petr
>
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