Albert Crosby wrote:
I'm new to R - and trying to create a plot similiar to the spider plot at
http://www.statgraphics.com/eda.htm#radar .
I can't figure out several things... most of which I would think would be
straightforward....
How can I change the lines for each series plotted instead of creating a
filled area?
How can I get the labels for each of the radial axes at the outside of the
plot instead of on a small circle in the middle?
Is there an easy way to get a legend like the sample plot?
Here's my attempt so far, using the USJudgeRating dataset... I'm sure that
there's something simple that I'm missing....
stars(USJudgeRatings[1:2,1:9],locations = 0:1, scale=FALSE,
draw.segments=FALSE,
col.segments=1:5,col.stars=0,key.loc=0:1,
main="Radar/Spider Plot\nSee
http://www.statgraphics.com/eda.htm#radar",full=TRUE)
What I really want to do is plot a dataset like this one:
Year Below Basic Proficient Advanced
2005 10 25 30 35
2006 8 21 41 30
2007 15 24 48 14
2008 14 19 42 25
and get a graphic with 4 superimposed stars of different colors superimposed
showing the shape of the distribution for each year. The data is
percentsges of students scoring in each category, summing to 100. There are
actually scores for Literacy and Math, so I might display 8 radii instead of
the 4 above. And the dataset/graph would be repeated for comparing various
subpopulations.
Any pointers would be welcomed!
Hi Albert,
Try this and it may be what you want:
# this just gets your data
radplot<-read.table("../radarplot.dat",header=TRUE)
library(plotrix)
radial.plot(radplot[,2:5],label.pos=c(0,pi/2,pi,3*pi/2),rp.type="p",
labels=c("Below","Basic","Proficient","Advanced"),main="Performance")
# let the legend extend beyond the plot
par(xpd=TRUE)
legend(-50,50,radplot[,1],col=1:4,lty=rep(1,4))
par(xpd=FALSE)
Jim
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