[R-sig-Geo] mapping by zip codes

[Paul Hiemstra]

Hi,

I gave the answer in my previous e-mail

library(sp)
data(meuse) # data.frame
# The columns with the x and y coordinates are called "x" and "y"
coordinates(meuse) = ~x+y # SpatialPointsDataFrame

A good source of additional information is the sp-documentation or the 
book Applied Spatial Data Analysis in R.

cheers,
Paul

Alina Sheyman schreef:
> My data consists of lat, long, and the number of customers associated 
> with each
> How do I go about converting my data.frame to a spatial object?
>
> On Tue, Mar 3, 2009 at 3:40 PM, Paul Hiemstra <p.hiemstra at geo.uu.nl 
> <mailto:p.hiemstra at geo.uu.nl>> wrote:
>
>     Hi,
>
>     You have to provide some more info in order for us to answer you
>     question. How does 'your data' look like? A data.frame with x and
>     y coordinates and more info? If this is correct, you need to
>     convert the xy data.frame to a spatial object:
>
>     library(sp)
>     data(meuse) # data.frame
>     # The columns with the x and y coordinates are called "x" and "y"
>     coordinates(meuse) = ~x+y # SpatialPointsDataFrame
>
>     Then you can use overlay() to find out in which customer is in
>     which polygon. Then you can count the number of customers per zip
>     code.
>
>     cheers,
>     Paul
>
>     Alina Sheyman schreef:
>
>         I'm very new to creating maps using shapefiles, so this
>         question might be
>         pretty basic.
>
>         I'm trying to create a map of the US, divided up by zip codes,
>         where i then
>         map number of customers by zip code.
>         I located shapefiles for US with zip codes (although at this
>         point only for
>         individual states, and not the entire country) and read it
>         into R using
>         maptools,
>         but now I need to apply my data (which I read into R as a
>         separate data
>         frame and not a shapefile) to that map. Which is the part
>         where I get
>         completely lost and not sure how to proceed. If anyone could
>         give me any
>         pointers I'd really appreciate it.
>
>         thank you
>
>                [[alternative HTML version deleted]]
>
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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 274 3113 Mon-Tue
>     Phone:  +3130 253 5773 Wed-Fri
>     http://intamap.geo.uu.nl/~paul <http://intamap.geo.uu.nl/%7Epaul>
>
>


-- 
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 274 3113 Mon-Tue
Phone:  +3130 253 5773 Wed-Fri
http://intamap.geo.uu.nl/~paul