Re: [R] polar.plot add argument
On 04/18/2012 05:32 PM, Etienne RIFA wrote: Hello I try to create a polar.plot in order to represent some paths. I have one more information: the signal quality. I created classes and I used the argument add to superimpose my different signal levels. the result: http://i180.photobucket.com/albums/x82/zetiem/21.png Normally, the hotter spots should follow the green path. Despite this, we can see that the shape of the paths are the same for hot spots but on a smaller scale. I think that polar.plot with add argument ignores the scale of the active plot. I saw that by changing the radius scale (elevation angle). With 0° at the center, I have the same polar.plot. But I don't know how to fix it. Have you any ideas? Hi Etienne, Without your data I can only guess at what might be going wrong. One guess is that you specified explicit values for the radial.lim argument in the initial call and then did not do so in the add call. If you don't want to send your data, try to create a fake data set that will do the same thing. Then I could try to debug it. Jim __ R-help@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.
Re: [R] polar.plot text labels for data points
On 05/06/2010 03:24 AM, Tali wrote:
Hello All.
I am using polar.plot from the {plotrix} library to visualize individual
coral colonies, dying, growing, etc through time. These coral colonies, that
I visit annually happen to be delineated by a circular plot underwater;
hence polar.plot is the best way to visualize my data. (I.e. This is not
cyclical data that I am plotting.) I am trying to label individual data
points (which correspond to actual coral colonies) with their identifying
tag numbers. I have searched and searched and found no polar.plot with text
labels on data points.
I tried to coerce the text function (code below). But no dice.
D = runif(29,0,7) #Distance from center of circular plot (in
meters)
H = runif(29,0,360) #Compass heading to center of circular plot (in
degrees)
polar.plot(D, H,rp.type = dots, start = 90, point.col = red)
TagID = 200:228 #Labels of individual coral colonies
text(D,H,TagID)#lame attempt at coercing the text function
Is it possible to add text labels to data points in polar.plot?
Hi Tali,
What a great idea!
radial.labels-function(lengths,radial.pos,units=radians,start=0,clockwise=FALSE,
labels,adj=NULL,pos=NULL,...) {
if(units == clock24) radial.pos-pi*(450-radial.pos*15)/180
if(units == polar) radial.pos-pi*radial.pos/180
if(clockwise) radial.pos--radial.pos
if(start) radial.pos-radial.pos+start
# get the vector of x positions
xpos-cos(radial.pos)*lengths
# get the vector of y positions
ypos-sin(radial.pos)*lengths
text(xpos,ypos,labels,adj=adj,pos=pos,...)
}
You have now immortalized yourself in the plotrix NEWS file. The next
version will include this function. Briefly, pass the same lengths,
pass your polar.pos as radial.pos and set units to polar. The
other arguments are the same as in radial.plot and text.
Any assistance will help save an endangered species. (Really!)
I hope that the endangered species to be saved is humanity.
Jim
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Re: [R] polar.plot
Jim and John, Thanks for your replies. I ended up using both suggestions to plot the full tide series and then overlay the averages for rise and fall in different colours, which illustrated very well how such parameters can be misleadings in some cases. Regards, Tony 2009/10/31 Jim Lemon j...@bitwrit.com.au On 10/31/2009 04:49 AM, Tony Greig wrote: Hi, Two questions: 1 - Say I have average speed and directions for tide and I would like to plot them on a polar plot, but with different colors so I can indicate the two directions. I'm using polar.plot from the plotrix library. How can I add a second b and dir.b series to a polar.plot? library(plotrix) a = 3 dir.a = 85 b = 4 dir.b = 250 polar.plot(a, dir.a, start = 90, clockwise = T, show.grid.labels = T, radial.lim=c(0,5), line.col=2, lwd=2) 2 - Which parameter in polar.plot can I use to set the orientation for the grid labels which seem to default at 90 in my example above? Hi Tony, The first one is easy: polar.plot(c(a,b), c(dir.a,dir.b), start = 90, clockwise = T, show.grid.labels=FALSE, radial.lim=c(0,5), line.col=2, lwd=2) I have had one other person as about an add option, and I might include that in a future version. The second one is a bit harder. You probably noticed that I changed the show.grid.labels argument to FALSE in the above. par(xpd=TRUE) boxed.labels(rep(0,5),1:5,1:5,border=NA) par(xpd=FALSE) This will put the labels vertically up from the center. Doing fancier things like having the labels at an angle would require calculating the positions, which isn't too hard. Jim [[alternative HTML version deleted]] __ R-help@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.
Re: [R] polar.plot
--- On Fri, 10/30/09, Tony Greig tony.gr...@gmail.com wrote: From: Tony Greig tony.gr...@gmail.com Two questions: 1 - Say I have average speed and directions for tide and I would like to plot them on a polar plot, but with different colors so I can indicate the two directions. I'm using polar.plot from the plotrix library. How can I add a second b and dir.b series to a polar.plot? You may be able to set par(new=TRUE) but it looks to me like polar.plot sets the radius for each graph so you would need to come up with a way of dealing with this. library(plotrix) a = 3 dir.a = 85 b = 4 dir.b = 250 polar.plot(a, dir.a, start = 90, clockwise = T, show.grid.labels = T, radial.lim=c(0,5), line.col=2, lwd=2) 2 - Which parameter in polar.plot can I use to set the orientation for the grid labels which seem to default at 90 in my example above? start ? polar.plot(a, dir.a, start = 90, clockwise = T, show.grid.labels = T, radial.lim=c(0,5), line.col=2, lwd=2) op - par(new=TRUE) polar.plot(b, dir.b, start = 90, clockwise = T, show.grid.labels = T, radial.lim=c(0,5), line.col=1, lwd=2) par(op) __ [[elided Yahoo spam]] __ R-help@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.
Re: [R] polar.plot
On 10/31/2009 04:49 AM, Tony Greig wrote: Hi, Two questions: 1 - Say I have average speed and directions for tide and I would like to plot them on a polar plot, but with different colors so I can indicate the two directions. I'm using polar.plot from the plotrix library. How can I add a second b and dir.b series to a polar.plot? library(plotrix) a = 3 dir.a = 85 b = 4 dir.b = 250 polar.plot(a, dir.a, start = 90, clockwise = T, show.grid.labels = T, radial.lim=c(0,5), line.col=2, lwd=2) 2 - Which parameter in polar.plot can I use to set the orientation for the grid labels which seem to default at 90 in my example above? Hi Tony, The first one is easy: polar.plot(c(a,b), c(dir.a,dir.b), start = 90, clockwise = T, show.grid.labels=FALSE, radial.lim=c(0,5), line.col=2, lwd=2) I have had one other person as about an add option, and I might include that in a future version. The second one is a bit harder. You probably noticed that I changed the show.grid.labels argument to FALSE in the above. par(xpd=TRUE) boxed.labels(rep(0,5),1:5,1:5,border=NA) par(xpd=FALSE) This will put the labels vertically up from the center. Doing fancier things like having the labels at an angle would require calculating the positions, which isn't too hard. Jim __ R-help@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.
