1. Look into the ggmap package if you want to overlay your data onto a map.
2. Re your color scale representation, define 'appropriately'. Do you
mean a continuous range expressible in a colorbar or a discrete range,
and if the latter, what intervals did you have in mind?
Dennis
On Fri, Apr 4, 2014 at 2:42 AM, drunkenphd <enrraco at fimif.upt.al>
wrote:> Hi,
> I have a list of cities and their coordinates, and also for each city I
have
> a variable varA which I want to represent in a map using ggplot.
> For example :
>
> CityA lat 22.93977 lon 46.70663 varA 545
>
> CityB lat 23.93977 lon 46.70663 varA 122
>
> VarA values begin from 0 to 3000.
> I want the color scale to represent this range appropriately.
> Can you help
> Regards
>
>
>
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