Create an Extent object by drawing on a map
Click on two points of a plot (map) to obtain an object of class Extent ('bounding box')
drawExtent(show=TRUE, col="red")
show |
logical. If |
col |
sets the color of the lines of the extent |
Extent
## Not run: r1 <- raster(nrow=10, ncol=10) values(r1) <- runif(ncell(r1)) plot(r1) # after running the following line, click on the map twice e <- drawExtent() # after running the following line, click on the map twice mean(values(crop(r1, drawExtent()))) ## End(Not run)
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