Hi Denis,
 
Thank you so much. This is exactly what i needed. I am not telling you how much time i wasted to change default colors for fill and colour, coming up with pretty weird ideas, non working, of course.
 
Thanks again,
 
Monica
 
> Date: Tue, 1 Apr 2014 02:23:08 -0700
> Subject: Re: [R] colors in violin plot, ggplot2
> From: djmuser@gmail.com
> To: pisicandru@hotmail.com
> 
> Hi:
> 
> Your example is not reproducible in the absence of data, but this is
> an opportunity to show you how to make one. I'm using the built-in
> mtcars data set for illustration. Assuming that all you want is to
> change the default color/fill scheme, here's one way to do it.
> 
> library(ggplot2)
> 
> mtcars1 <- mtcars    # make a copy of mtcars
> # Change cyl from numeric to factor
> mtcars1$cyl <- factor(mtcars1$cyl)
> 
> ggplot(mtcars1, aes(x = cyl, y = mpg, fill = cyl,
>                         colour = cyl)) +
>     geom_violin(alpha=0.3, width=1, trim = FALSE, scale = "width",
>                    adjust = 0.5) +
>     geom_boxplot(width=0.2, outlier.colour="red", notch = FALSE,
>                    notchwidth = .5, alpha = 0.5, colour = "grey50") +
>     scale_colour_manual(values = c("orange", "brown", "forestgreen")) +
>     scale_fill_manual(values = c("orange", "brown", "forestgreen"))
> 
> Dennis
> 
> On Mon, Mar 31, 2014 at 7:43 PM, Monica Pisica <pisicandru@hotmail.com> wrote:
> > Hi,
> >
> >
> >
> > I am using ggplot and geom_violin to build a violin plot of some with only 2 categories. All is good except that I cannot set up the colors I want or the violin plots. Either I have same color for both my categories or colors from probably rainbow(2), which are red and blue. What if I want brown and forestgreen. How do I do it?
> >
> >
> >
> > so my code follows:
> >
> >
> > p <- ggplot(x1, aes(Location, aer_m_GPS , fill=factor(Location), colour=factor(Location)))
> >
> >
> > p1 <- p+geom_violin(alpha=0.3, width=1, trim = FALSE, scale = "width", adjust = 0.5) + geom_boxplot(width=0.2, outlier.colour="red", notch = FALSE, notchwidth = .5, alpha = 0.5, colour = "grey50")
> >
> >
> > p1
> >
> >
> >
> > This will plot the violin plot with boxplot superimposed on it, both with color red and blue. I hope to get brown and forestgreen.
> >
> >
> > Thanks for any advice,
> >
> >
> > Monica
> > ______________________________________________
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> > 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.
 		 	   		  
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