On 08/24/2010 03:58 PM, Thiago Veloso wrote:
> Dear Dr. Hijman,
> Thank you for the reply.
> Initially I was thinking in using a GIS approach, as a state map would to
> be involved in the process.
> Please check this link:
> http://img836.imageshack.us/img836/7021/fig6vdist.png
> A work colleague produced this map using ArcGIS, but at a cost of almost a
> entire morning.
> I was wondering if it is possible to reproduce that using R + GIS packages.
> Best regards,
> Thiago.
>
In addition to the reply by Pierre Roudier, take a look at the ggplot2
pacakge. An example:
library(sp)
library(ggplot2)
data(meuse)
summary(meuse)
ggplot(aes(x = x, y = y, size = copper, color = ffreq), data = meuse) +
geom_point()
So here the size of the objects is determined by the copper attribute,
the color by the ffreq attribute. This should be relatively easy to port
to your dataset.
cheers,
Paul
> --- On Mon, 23/8/10, Robert J. Hijmans<r.hijm...@gmail.com> wrote:
>
> From: Robert J. Hijmans<r.hijm...@gmail.com>
> Subject: Re: [R-sig-Geo] Mapping multiple attributes at once
> To: "Thiago Veloso"<thi_vel...@yahoo.com.br>
> Cc: r-sig-geo@stat.math.ethz.ch
> Date: Monday, 23 August, 2010, 13:25
>
> Dear Thiago,
>
> If you are using (basic) 'plot' you can pass a vector with the
> required sizes, i.e. your variable, perhaps after a transformation, as
> cex argument. Same approach works for col.
>
> plot(1:10, cex=c(1:5,1:5), col=rep(c('red', 'blue'), each=5), pch=20)
>
> Robert
>
> On Mon, Aug 23, 2010 at 7:26 AM, Thiago Veloso<thi_vel...@yahoo.com.br>
> wrote:
>
>> Dear SIG colleagues,
>> In my present study I need to plot a map containing two different
>> attributes of some localities. I figured out that a convenient and
>> didactic way would be via something like bubble plots. For example, the size
>> of the circle would be proportional to a certain range of values (4
>> categories) and its inner colors (also 4 categories) would be proportional
>> to the p-values of a statistical test.
>> Is it possible to implement that idea using SIG tools in R? Any
>> suggestions on how to do it??
>> Thanks in advance and best wishes,
>> Thiago.
>>
>>
>>
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>>
>>
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>
>
>
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>
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--
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone: +3130 253 5773
http://intamap.geo.uu.nl/~paul
http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770
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