Simple way to subset SpatialPolygonsDataFrame (i.e. delete polygons) by attribute in R

Question

I would like simply delete some polygons from a SpatialPolygonsDataFrame object based on corresponding attribute values in the @data data frame so that I can plot a simplifi

Answer 1

Just to mention that subset also makes the work avoiding to write the data's name in the condition.

world.map <- subset(world.map, AREA > 30000)
plot(world.map)