On 10/30/2013 04:02 AM, palad...@trustindata.de wrote:
Hello,
I would like to draw a map of Europe. Each country should be colored
depending on how it scores in an index called GPIndex.
Say a dark red for real bad countries a light red for those which are
not so bad, light blue for the fairly good ones and so on up to the
really good ones in a dark blue.
I never worked with geographic maps before so I tried library maps but I
didn't get far,- especially because all examples I found only seem to
work for the United states. So I'm a bit lost.
I would be nice if somebody could help me.
Hi Claudia,
If you draw a map of Europe something like this:
world.map<-map('world', fill = TRUE,
col = 1:10,xlim=c(-15,40),ylim=c(37,70))
you have a "col" argument that you can pass the colors you want. What
you must do is look at the "names" component of "world.map":
$names
[1] "Denmark"
[2] "USSR"
[3] "Italy"
[4] "Netherlands"
[5] "Iraq"
...
to get the indices of the countries. Say Denmark was fairly good, USSR
was fairly bad, and so on. You could then pass colors like this:
col=c("lightblue","lightred",...)
in the call to map for as many countries as you wanted. Pass NA for
those countries that you don't want to color.
Jim
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