[R] OT RE: US States percentage change plot

[Yihui Xie]

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noticed there was another unpublished package named cart in R-Forge,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 <xieyihui at 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 <FarleyR at 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-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Greg Snow
> Sent: Thursday, October 13, 2011 11:28
> To: Michael Charles Bailey I; r-help at 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.snow at imail.org
> 801.408.8111
>
>
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
>> project.org] On Behalf Of Michael Charles Bailey I
>> Sent: Wednesday, October 12, 2011 6:46 PM
>> To: r-help at 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]]
>>
>> ______________________________________________
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>> 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 at 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 at 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.
>