R help - Aug 2009 - plotrix: reverse axis in polar.plot

Hi,
how can I reverse the radius axis of plotrix's polar.plot function?
Perhaps this sounds strange, but I use the radians for angles as well:
In the center is zenith and the corresponding angle is 90?, not 0. See
an example plot at
http://www.mysundial.ca/tsp/images/sun_chart_50_solar_polar.jpg

dirs<-c("S","E","N","W")
polar.plot(NA,NA,label.pos=seq(0,270,length=4),labels=dirs,main="Sun
Chart",rp.type="p",radial.lim=c(0,90))
lines(c(4,12,15,22,45,55),c(10,83,118,90,72,61),col="red")

And why is the radial limit in the above example 0..100 and not 0..90
as requested by the radial.lim argument?

Thanks for your help,
Thomas

Thomas Steiner wrote:
> ...
> I answered too fast:
> I want the radial, not the tangential axis to change direction. So the
> center will be (0,90) and the outer circle's second coordiante will be
> zero (the horizon).
> This might sound strange ? even for Australien people (-;
> Thomas
>
>   
This requires an extra argument to the function. I've included it and 
will probably upload a new version of plotrix within a week. I didn't 
quite understand your request for an example in which "the center is not 
contained in the polygon". If you can explain this a bit, I would be 
happy to include a better example.

Jim