One package that you can use is Rcartogram from Omegahat, although it took me a long long time to figure out how to use it for real maps. I noticed there was another unpublished package named cart in R-Forge, and I have never tried it.
I also want to know if there are other R packages that have as simple usage as "take the polygon coordinates and warp the polygons according to a variable". At least for Rcartogram, it is not so easy (due to the design of the C code by other authors). Maybe I'm going in a wrong direction (no cartogram algorithm is so straightforward?). Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 515-294-2465 Web: http://yihui.name Department of Statistics, Iowa State University 2215 Snedecor Hall, Ames, IA On Thu, Oct 13, 2011 at 1:43 PM, Farley, Robert <farl...@metro.net> wrote: > OT question: can R produce Cartograms? > > Here's an example of World Population: > http://www.worldmapper.org/display.php?selected=2 > > > This might make Texas smaller and Rhode Island larger.... > > > > Robert Farley > LACMTA > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Greg Snow > Sent: Thursday, October 13, 2011 11:28 > To: Michael Charles Bailey I; r-help@r-project.org > Subject: Re: [R] US States percentage change plot > > Unless your audience is mainly interested in Texas and California and is > completely content to ignore Rhode Island, then I would suggest that you look > at the state.vbm map in the TeachingDemos package that works with the > maptools package. The example there shows coloring based on a variable. > > -- > 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-bounces@r- >> project.org] On Behalf Of Michael Charles Bailey I >> Sent: Wednesday, October 12, 2011 6:46 PM >> To: r-help@r-project.org >> Subject: [R] US States percentage change plot >> >> Hi, I would like to make a plot of the US states (or lower 48) that are >> colored based upon a percentage change column. Ideally, it would >> gradually >> be more blue the larger the positive change, and more red the more >> negative >> is the change. >> >> The data I have looks like: >> >> State Percent.Change >> 1 Alabama 0.004040547 >> 2 Alaska -0.000202211 >> 3 Arizona -0.002524567 >> 4 Arkansas -0.008525333 >> 5 California 0.001828754 >> 6 Colorado 0.011116150 >> >> I have read help for the maps library and similar plots online but >> can't >> grasp how to map the percentage.change column to the map. thank in >> advance, >> >> Michael Bailey >> >> [[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. > > ______________________________________________ > 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. > ______________________________________________ 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.
