I have a SpatialPointsDataFrame with @data like this:
Using spplot(object, "variable") I draw map with coloured points (high-low values)
I want to know the row number of some points on my map. 
Something like this: 
click on the points which interest me -> print rownumber
I tried select.spatial(object, digitize = FALSE) but, map doesn't show colour points (high-low values) but all of my points are black.

 
    