package: maps and spatstat question
Hi Laura,
You might find the map_data function from the ggplot2 package helpful:
library(ggplot2)
library(maps)
head(map_data("state", "iowa"))
It formats the output of the map command into a self-documenting data frame.
Hadley
On Mon, Apr 6, 2009 at 7:00 AM, Laura Chihara <lchihara at carleton.edu> wrote:
I would like to use the output from the map function
in the package maps for use in, say, the spatstat
package. I don't quite understand the coordinates
for the border of the state:
Example:
library(maps)
iowa<-map("region","iowa)
x<-iowa$x
y<-iowa$y
There are NA's and duplicated coordinates.
What would I need to do to use this in the
spatstat owin command?
owin(poly= ?)
Thank you.
-- Laura
************************************************
Laura Chihara
Professor of Mathematics ?507-222-4065 (office)
Dept of Mathematics ? ? ? 507-222-4312 (fax)
Carleton College
1 North College Street
Northfield MN 55057
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