[R] specifying colours in a ggplot2 piechart

[John Kane]

Obviously I cannot type or spell.

Your solution was great but do you have any idea why 
  scale_colour_manual(value=mycolours)
does not work.  More typos on my part or am I misunderstanding what  scale_colour_manual(value=mycolours) is supposed to do?

Thanks


--- On Tue, 11/23/10, baptiste auguie <baptiste.auguie at googlemail.com> wrote:

> From: baptiste auguie <baptiste.auguie at googlemail.com>
> Subject: Re: [R] specifying colours in a ggplot2 piechart
> To: "John Kane" <jrkrideau at yahoo.ca>
> Cc: r-help at stat.math.ethz.ch
> Received: Tuesday, November 23, 2010, 2:02 PM
> fixing the various typos in your
> code, this works,
> 
> lat_plot() +
> scale_fill_manual(value=mycolours)
> 
> HTH,
> 
> baptiste
> 
> On 23 November 2010 19:47, John Kane <jrkrideau at yahoo.ca>
> wrote:
> > Someone was asking how to do a 16 category piechart in
> OpenOffice Calc and it appears that it can not be done
> (which we, probably, should be happy about) but I thought
> that I'd try it in ggplot2.
> >
> > It works but I then thought I'd like to make the
> colours more distinctive but fro some reason I don't seem to
> be able to use manually assigned colours.
> >
> > Can anyone suggest where I'm going wrong?
> >
> > Thanks
> >
> >
> ===================================================================
> >
> >
> > library(ggplot2)
> > mypie <- data.frame(xx = c(12,13,6,7,9,10,4, 3, 8,
> 6, 8, 4, 6,5,2,3),
> > zz = letters[1:16])
> >
> > mycolours <- c(a =  "red", b = "blue", c =
>  "green", d = "orange", e = "red",
> > f = "blue", g = "geen",   h = "orange", i = "red", j
> = "blue",
> > k = "green", l = "orange", m = "red",  n = "blue", o
> = "green",
> > p = "orange" )
> >
> >  pie1 <- ggplot(mypie, aes(x = factor(zz), fill =
> factor(zz))) + geom_bar(width = 1)
> >  pie2 <-  pie + coord_polar(theta = "x") +
> scale_colour_brewer(Pastel1)
> >  pie2
> >
> >  # try to get even nastier piechart with ugly colours
> to provide rast.
> >
> >  pie3 <- pie2 +
> scale_colour_manual(value=mycolours)
> >  pie
> >
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