[R] specifying colours in a ggplot2 piechart

[baptiste auguie]

Colour affects the lines and points in ggplot2, whilst fill is for
areas (polygons, etc.)

By the way, I can't type either -- I meant  last_plot().

baptiste


On 23 November 2010 20:18, John Kane <jrkrideau at yahoo.ca> wrote:
> 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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>> >
>>
>
>
>