Hi all,
I want to use world map in ggplot2 and show my data on world map. my df is:
$ COUNTRY : chr "DE" "DE" "FR" "FR" ..
$ ContrastColor : int 9 9 9 9 13 9 9 9 9 ..
$ quant : Factor w/ 4 levels "FAST","SLOW",..I need to merge my
df with world_map data which is like this:
world_map=map_data("world")
data.frame': 99338 obs. of 6 variables:
$ long : num -69.9 -69.9 -69.9 -70 -70.1 ...
$ lat : num 12.5 12.4 12.4 12.5 12.5 ...
$ group : num 1 1 1 1 1 1 1 1 1 1 ...
$ order : int 1 2 3 4 5 6 7 8 9 10 ...
$ region : chr "Aruba" "Aruba" "Aruba" "Aruba" ...
$ subregion: chr NA NA NA NA ...
but by merging my df with world map data I get a data frame with zero
observation in it,I use this command for merging:
world_map=merge(world_map,df,by.x="region",by.y="COUNTRY")
str(world_map)
'data.frame': 0 obs. of 133 variables:
$ region : chr
$ long : num
$ lat : num
$ group : num
$ order : int
$ subregion : chr
does anyone know what is the problem of this merging that I am currently using?
thanks for any help!
Elahe
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