Adding miniature plots at specific locations on a map
On 04/05/2010 09:27 AM, Euan Reavie wrote:
Hello all. I have plotted a map of the Great Lakes using maptools:
lakes<- readShapePoly('C:/grtlakes/',proj4string=CRS("+proj=longlat"))
plot(lakes, xlim=c(-93.5,-74.5),ylim=c(41,49.5),lwd=3,new=TRUE)
Now I want to plot small scatterplots relative to several sample locations on the map. After an afternoon of trying I have not been able to find a way to do this using a matrix of lat/long data (sample locations). I was hoping I could implement something similar to the "floating.pie" command in the plotrix package, except for scatter plots. For an example of what I'm trying to do (using line plots) see Fig. 1 in: http://epa.gov/glnpo/monitoring/publications/articles/laurentian_II.pdf At this point I'm not concerned about crowding. If I can simply place the small plots on a map I can figure out crowding issues later. Is there a package that can do this, or can I work with the base package? At this point, if i could figure out a way to assign lat/long coordinates to a simple plot like:
plot(sample(10,10,10))
...I would be happy. Any recommendations for packages, etc. would be welcome.
Hi Euan, I think the subplot function in the TeachingDemos package might do what you want. Jim