Dan, google refine http://goo.gl/AeKml can actually transform zip codes
into longitude/latitude - http://goo.gl/1HDWb will show you how to do this
from street adresses, but it should also work from city names -- i think it
will allocate a default long/lat for a city, but not sure of the exact
mechanism

On Fri, Aug 3, 2012 at 1:10 PM, Lopez, Dan <lopez235@llnl.gov> wrote:

> Thank you!
> Dan
>
> From: Sarah Goslee [mailto:sarah.goslee@gmail.com]
> Sent: Thursday, August 02, 2012 5:51 PM
> To: Lopez, Dan
> Cc: R help (r-help@r-project.org)
> Subject: Re: [R] Plotting Where People Live on a U.S. Map
>
> Hi Dan,
>
> For question 1, yes you'll need geographic coordinates. I thinknit's
> possible to get a shapefile of zip codes, but maybe someone else will know
> the details.
>
> For #2, you  probably want maps instead of map, and you need to load a
> package before you can use it:
> install.packages("maps")
> library(maps)
> and then your code.
>
> Sarah
>
> On Thursday, August 2, 2012, Lopez, Dan wrote:
> Hi,
>
> QUESTION TOPIC #1
> I have some data I want to plot on a map. But what I have are home
> addresses: street, City, State, complete postal code--i.e 95377-1234. Is
> there a way to plot this data or do I need latitudinal and longitude
> coordinates? If so how do I convert them? Is there a package that will do
> the conversion in R?
>
> QUESTION TOPIC #2
> I was trying to experiment with this code that I found at the site below
> but got a message that indicated that the "map" function is not found. So I
> tried installing the maps package but got the below message. Is there an
> alternative way of doing this (please refer to URL below)?
>
> # The message I got:
> > install.packages("map")
> Warning message:
> package 'map' is not available (for R version 2.15.0)
>
> # The code I tried to run:
> states <- data.frame(map("state", plot=FALSE)[c("x","y")])
> colnames(states) <- c("Lon","Lat")
> ggplot(states, aes(x=Lon, y=Lat)) + geom_path()
>                 + geom_point(alpha=0.6,size=0.3,data=subway)
>
> # Where I got the code from and also an image of what I am attempting to
> do (please enter this in your URL)
>
> http://www.google.com/imgres?um=1&hl=en&biw=1790&bih=845&tbm=isch&tbnid=4rMjXYA_w1qDiM:&imgrefurl=http://www.informaniac.net/&docid=SJqcsPghztrj0M&imgurl=http://lh5.ggpht.com/_yBbodrC25kU/Ta6Ifqr0ZLI/AAAAAAABRCg/98rIF-kMMns/map%25255B7%25255D.png&w=512&h=319&ei=mgsbUIzqJuKbiAL5v4DQDg&zoom=1&iact=hc&vpx=176&vpy=477&dur=5741&hovh=177&hovw=285&tx=110&ty=113&sig=117496213270544868088&page=2&tbnh=125&tbnw=200&start=32&ndsp=40&ved=1t:429,r:0,s:32,i:175
>
> Dan
>
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>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
> --
> Sarah Goslee
> http://www.stringpage.com
> http://www.sarahgoslee.com
> http://www.functionaldiversity.org
>
>         [[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.
>

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