[R] How to save google map in r ?

[Kristi Glover]

Hi R users,
I am struggling to save the map with georeferenced (TIFF) that was imported from google map. I would be very grateful with your input. How can I save this image and reuse it when I need? I used the following code
library(ggmap)
library(mapproj)
map <- get_map(location = 'Europe', zoom = 4)
ggmap(map)
writeRaster(map, filename = "texting.tif")

but got the following message

"Error in (function (classes, fdef, mtable)  :
  unable to find an inherited method for function �writeRaster� for signature �"gg", "character"�"

thanks


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