Re: [R] radial.plot shaded region

[Hodge, Steven]

From: Jim Lemon [j...@bitwrit.com.au]
Sent: Tuesday, December 10, 2013 21:57
To: Hodge, Steven
Cc: r-help@r-project.org
Subject: Re: [R] radial.plot shaded region

On 12/11/2013 11:24 AM, Jim Lemon wrote:
 ...
 There may be a solution using the radial.pie function, and if I find it,
 I'll post it.

 Hi Steve,
 Here it is. Just call radial.pie twice to get the annulus, then call
 radial.grid with the appropriate arguments, and then you can add
 whatever radial.plot you want, using the add argument.
 
 radial.pie(3.5,sector.colors=lightblue)
 radial.pie(3,sector.colors=white,add=TRUE)
 radial.grid(radial.lim=c(0,3.5),grid.pos=seq(0,3.5,length.out=8))
 
 Jim

Thank you very much! Both of your solutions work for me.

Steve
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[R] radial.plot shaded region

[Hodge, Steven]

I'm working with radial.plot in the plotrix package.

Is there a way to show a shaded region for a specific range of values in 
radial.lim?

For example:
# test data from radial.plot{plotrix}
testlen-c(sin(seq(0,1.98*pi,length=100))+2+rnorm(100)/10)
testpos-seq(0,1.98*pi,length=100)

# the original plot
radial.plot(testlen,testpos,rp.type=p,main=Test Polygon,line.col=blue)

# my attempt to shade the region between 3 and 3.5:
radial.plot(
matrix(c(3.5, 3), byrow = TRUE),
matrix(c(testpos, testpos), byrow = TRUE, nrow = 2),
rp.type=p,
main=Test Polygon,
poly.col = c('light blue', 'white'),
radial.lim = c(0, 3.5)
)
# In effect, draw a polygon at 3.5 filled with light blue, then another at 3 
filled with white.
# Now overplot the values of interest:
radial.plot(testlen,testpos,rp.type=p,main=Test Polygon,line.col=blue, 
radial.lim = c(0, 3.5), add = TRUE)

Is there an easier way? How can I re-draw the grid lines that are in the 
original plot?

Thanks,

Steve

. . . . . . . . . . . . . . .
Steven M. Hodge
Child and Adolescent Neurodevelopment Initiative S3-301
University of Massachusetts Medical School
55 Lake Avenue North
Worcester, MA 01655
steven.ho...@umassmed.edu

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