[R] plot points using circles filled half in red and half in blue.

[Eik Vettorazzi]

Hi Alan,
on an UTF-8 locale you can use \u25D6 and \u25D7, but you have to plot
group a=4 twice.

On Windows in a non-utf locale you can use a special Windows font:

windowsFonts(wdg2=windowsFont("Wingdings 2"))

plot(0:1,0:1)
strh<-strheight("x")/2.02
points(x = 0.5, y = 0.75+strh/2,pch="¼",family="wdg2",col="red")
points(x = 0.5, y = 0.75-strh/2,pch="½",family="wdg2",col="green")

strw<-strwidth("º")
points(.4-strw/2,.7,pch="º",family="wdg2",col="red")
points(.4+strw/2,.7,pch="»",family="wdg2",col="green")

Cheers

Am 28.03.2012 04:49, schrieb alan:
> I want to plot many points and want to use circles. The filling color
> depends on variable a. if a=1, then not fill
> if a=2 then fill with red, if a=3 then fill with blue, if a=4, fill
> half with red and half with blue. Can anyone tell me how to plot the
> case "a=4"? Thanks a lot
> 
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Eik Vettorazzi

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