Hello,
how can I visualize the legend in the following ggmap plot ? In the legend
I just want to show the size ranges of the data:
ggmap(map) + geom_point(aes(x=Longitude,y=Latitude), size = dataRd[,2]/12,
col=2, data=dataRd, alpha=0.7, lwd=2)
Thanks
Edoardo
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