R help - Jun 2011 - Creating a Polar Plot with expanding points as radius increases

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

I would look at the ggplot2 package, I have seen examples using ggplot2 that
look similar to what you describe.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Patrick Jemison
Sent: Monday, June 27, 2011 4:36 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Creating a Polar Plot with expanding points as radius increases

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

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

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
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

On 06/28/2011 08:35 AM, Patrick Jemison 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).
>
Hi Patrick,
polar.plot (or other plots in the radial.plot family) currently don't 
plot sectors or fill the (what the heck is the intersection of a sector 
and an annulus called?) to illustrate a third value (say, proportion) in 
addition to direction and intensity. However, it can be done, and I 
might just have a shot at it if I can scratch up an hour or two sometime 
in the next couple of years. Well, maybe sooner than that. Look out for 
"radial.pie".

Jim