[R] Creating a Polar Plot with expanding points as radius increases

[baptiste auguie]

Try this,


library(ggplot2)

d <- data.frame(theta = runif(10, 0, 360), r = runif(10, 0, 3))

ggplot(d, aes(x=theta, y=r, size=r)) + coord_polar(start=0)+
  geom_point() +
  scale_x_continuous(breaks=seq(0, 360, by=30), expand=c(0,0), lim=c(0, 360))+
  scale_area()

HTH,

baptiste

On 28 June 2011 10:35, Patrick Jemison <jemison at gmail.com> wrote:
> I'd like to create a polar plot similar to those created by the polarFreq
> function in the openair package.  However, this package seems to be specific
> to wind speed and direction, and requires a "ws" (wind speed) and a "wd"
> (wind direction) column.  My data is unrelated to wind speed, but I'd like
> to be able to get a plot that does what polarFreq's plots do; I'd like to
> have points that expand as their distance from the center increases.
>
> http://www.oga-lab.net/RGM2/func.php?rd_id=openair:polarFreq
>
> Without this property, my plot looks more like spokes on a wheel, or similar
> to the polar.plot function in the plotrix package:
> http://www.oga-lab.net/RGM2/func.php?rd_id=plotrix:polar.plot
>
> Is there a package or function available that allows the creation of a plot
> as described above for a generic set of polar data?  I spent a few hours
> today trying to find something I could use, but no luck yet.
>
> I'm using data of the form: x = r, y = theta, and z = a value to plot at the
> corresponding r,theta (as a comparison, for the polarFreq plot, z would be
> the frequency that is indicated by various colors in the plot).
>
> I appreciate any help!
>
> Patrick Jemison
>
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