Thank you Greg, I'll add 180 then.
Thanks for the hint with longer radial.lim arguments it works woderfull. > The lines function is plotting in Cartesian coordinates, not the polar > coordinates. Is there any (lines) function that plots polar coordinates to an existing plot? Thank you very much! Thomas 2010/6/3 Greg Snow <greg.s...@imail.org>: > It looks like polar.plot does not handle negative lengths, you can preprocess > the data and just add 180 degrees to the angles corresponding to negative > lengths and then use their absolute values. > > The radial.lim is not ignored, based on the documentation the range is then > made pretty (and 100 is apparently prettier than 90), if you pass a longer > vector (e.g. c(30,60,90) ) then those exact values will be used. > > The lines function is plotting in Cartesian coordinates, not the polar > coordinates. > > -- > Gregory (Greg) L. Snow Ph.D. > Statistical Data Center > Intermountain Healthcare > greg.s...@imail.org > 801.408.8111 > > >> -----Original Message----- >> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- >> project.org] On Behalf Of Thomas Steiner >> Sent: Thursday, June 03, 2010 8:09 AM >> To: r-help@r-project.org >> Subject: [R] plot polar coordinates >> >> Hi, >> I'd like to plot in in polar coordinates a line which is given as a >> vector of lengths and angles. >> >> library("plotrix") >> polar.plot(length=c(1,-13,3,- >> 1),polar.pos=c(20,20,45,55),rp.type="p",line.col="red",lwd=3,clockwise= >> TRUE,label.pos=seq(30,360,by=30),labels=c("ESE","SSE","S","SSW","WSW"," >> W","WNW","NNW","N","NNE","ENE","E"),radial.lim=c(0,90)) >> lines(seq(0,285,by=15),rep(c(40,60),times=10),col="blue") >> >> My questions: >> a) Why is the radial.lim=c(0,90) ignored? >> b) Why is there no red line? >> c) Why is the blue line not "jumping" between two circles of radius 40 >> respectively 60 (The first argument of "line" should be the angle, the >> second the length.)? Or: which function plots in existing polar plots? >> (Remark the the polygone is not complete, eg going around) >> >> My final goal will be such a plot: >> http://www.mysundial.ca/tsp/images/sun_chart_50_solar_polar.jpg which >> is the polar-coordinate version of my wikimedia plot >> http://commons.wikimedia.org/wiki/File:Sonnenstand.png (made in R, see >> source) >> Thanks for hints and help, >> Thomas >> >> PS: I asked a close question last year: >> http://www.mail-archive.com/r-help@r-project.org/msg64998.html >> >> ______________________________________________ >> 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. > ______________________________________________ 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.
