[R] images and maps in R

Don MacQueen macq at llnl.gov
Sat May 28 00:37:56 CEST 2005

This is is not difficult from the online help for the map() function. 
Here is an example.

map('state', region = c('new york', 'new jersey', 'penn'),fill=TRUE,col=1:4)

There is also an example there in how to add text to the map.

Another way uses the maptools package.


and then follow the examples given in the help page for plot.Map().

At 2:42 PM -0700 5/27/05, yyan liu wrote:
>   I have a question arising from my project.
>   A sample of the data is below. The first row stands
>for the names of state in USA. The second row stand
>for some numeric value in that state. Some of them are
>NA. I can use the commands "data(stateMapEnv)" and
>"map('state', fill = F)" in library "maps" to make a
>plot of USA states. What I want to do is: 1. put the
>corresponding state name on the Map 2. give different
>state different colors which is related to their
>value. For example, "red" for values ranging from
>0-30, "green" for values from 80-90, etc. 3. if
>possible, put the value of each state within the state
>on the map. here, take the numeric value as some text.
>Thank you very much!
>91	80	NA	NA	17  33   20
>R-help at stat.math.ethz.ch mailing list
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA

More information about the R-help mailing list