ermimi wrote:
Hello Friends!!!
I would want draw a circular histogram, and I would like draw a polygon with
a circular side. This is easy if I use the functions polygon and arc, but I
want that the polygon with a circular side have background colour. The
polygon created with function polygon can have background colour, but the
surface created with function arc can´t have background colour.
How I could create a polygon with a circular side that have background
colour??
Thank you very much,
A greetings Luismi
Hi Luismi,
The phrase "circular histogram" brings to mind something like a wind
rose. There are a few you could try:
windrose in the oce and circular packages
rosavent in the climatol package
oz.windrose in the plotrix package
and perhaps rose in the IDPmisc package
Now about this "polygon with a circular side". I think you mean the
standard issue polygon like a rectangle except that one side is a
circular arc instead of a straight line. If this bold conjecture is
correct, here is an example for you:
plot(0,xlim=c(-1,1),ylim=c(-1,1),xlab="",ylab="",
type="n",axes=FALSE)
polygon(c(0,-1,-1,0,cos(seq(pi/2,0,length.out=50)),
cos(seq(2*pi,3*pi/2,length.out=50))),c(-1,-1,1,1,
sin(seq(pi/2,0,length.out=50)),sin(seq(2*pi,3*pi/2,length.out=50))),
border="#ffaaaa",col="#66ee33")
Jim
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