Chuck White wrote:
> Here's a piece of code used to plot some locations on a map.
>
> from rpy2.robjects import r,RDataFrame,globalEnv
> r.library('maps')
> self.store_info = r['read.delim']('file.dlm', sep='|', header=True)
> r.png(file='locations.png', width=1500, height=840, bg='transparent')
> r.map('state')
> r.points(r['$'](self.store_info,'LONGITUDE'),
> r['$'](self.store_info,'LATITUDE'), pch=19, col='blue', cex=0.8)
> r['dev.off']()
>
> Input file:
> LOC_ID|LATITUDE|LONGITUDE|ACCURACY
> 123|44.7294508|-93.2176135|8
> 456|45.4878370|-122.7877570|8
>
> I would also like to show us capitals on this map.
> map.cities(us.cities, capital=2)
That might be more an R question for the authors of the map package.
The doc for that R package says something along the lines of:
map("usa")
data("us.cities")
map.cities(us.cities, capital = 2, cex = 0.5)
Translating to rpy2 is rather straightforward:
rdata = r['data']
plotmap = r['map']
plotcities = r['map.cities']
rdata('us.cities')
us_cities = globalEnv['us.cities')
plotmap("usa")
plotcities(us_cities)
L.
> How do I specify that?
>
> Thanks.
>
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