Dear all, I have data organized in a way like this Data[[CharacteristicsList1]][[CharacteristicsList2]][[CharacteristicsList3]][[CharacteristicsList4]] where CharacteristicsList4 there is a DF stored with various columns of name V1,V2, ... , Vn Is there an easy way to get a vector of all the values in, lets say V3, in all CharacteristicsLists without the need for FOR-loops? I figured there could be something like Data[[:]][[:]][[:]][[:]][[V3]] Many thanks, Ingo [[alternative HTML version deleted]]