[R] Plotting bar graph over a geographical map

[Hadley Wickham]

Hi Simon,

You might want to try sending a small reproducible example
(https://github.com/hadley/devtools/wiki/Reproducibility) to the
ggplot2 mailing list.

Hadley

On Tue, Jan 31, 2012 at 10:53 PM, sjlabrie <sjlabrie at mit.edu> wrote:
> Hi,
>
> I am looking for a way to plot bar on a map instead of the standard points.
> I have been using ggplot2 and maps libraries.
> The points are added with the function geom_point. I know that there is a
> function
> geom_bar but I can't figure out how to use it.
>
> Thank you for your help,
>
> Simon
>
> ### R-code
> library(ggplot2)
> library(maps)
>
> measurements <- read.csv("all_podo.count.csv", header=T)
> allworld <- map_data("world")
>
> pdf("map.pdf")
> ggplot(measurements, aes(long, lat)) +
>  geom_polygon(data = allworld, aes(x = long, y = lat, group = group),
>  colour = "grey70", fill = "grey70") +
>  geom_point(aes(size = ref)) +
>  opts(axis.title.x = theme_blank(),
>  axis.title.y = theme_blank()) +
>  geom_bar(aes(y = normcount))
> dev.off()
> ###
>
>
>
>
> --
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>
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-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/