R help - Aug 2016 - Colour gradients in ggtern

Hello,

This is my first time posting to the r-help mailing list and I'm a relative
amateur using R, so forgive my naivety. I am constructing a ternary diagram
using the ggtern extension of the ggplot package, and I'm having some
trouble with the colour gradient I want it to display. I have attached the
output plot, where a rainbow colour gradient can be seen, but I really need
these colours to be in reverse order. This is the command I used to construct
the plot;


#Plot construction
> ggtern(data= C27_C29_C31, aes(x=C27,y=C29,z=C31))+geom_point(aes(colour=
GST),size=3)+theme_light()+theme_nogrid_minor()+scale_colour_gradientn(colours =
rainbow(5.5))

Is there a simple way to reverse the colours in the scale_colour_gradientn
command?

Kind regards,
Jake Andrae



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Hi Jake,

maybe you can just revet the colours given to the scale:

scale_colour_gradientn(colours = rev(rainbow(5.5)))

Best,
Ulrik

On Tue, 2 Aug 2016 at 16:41 Jake William Andrae <jake.andrae at
adelaide.edu.au>
wrote:
> Hello,
>
> This is my first time posting to the r-help mailing list and I'm a
> relative amateur using R, so forgive my naivety. I am constructing a
> ternary diagram using the ggtern extension of the ggplot package, and
I'm
> having some trouble with the colour gradient I want it to display. I have
> attached the output plot, where a rainbow colour gradient can be seen, but
> I really need these colours to be in reverse order. This is the command I
> used to construct the plot;
>
>
> #Plot construction
>
> > ggtern(data= C27_C29_C31,
aes(x=C27,y=C29,z=C31))+geom_point(aes(colour>
GST),size=3)+theme_light()+theme_nogrid_minor()+scale_colour_gradientn(colours
> = rainbow(5.5))
>
>
> Is there a simple way to reverse the colours in the scale_colour_gradientn
> command?
>
> Kind regards,
> Jake Andrae
>
>
>
> ______________________________________________
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