In order to only look at 10% of my data I have used the filter
Rdf = Rdf.Filter("rdfentry_ % 10 == 0")
When I check the number of events before and after this filter is applied I see that 10% of events are maintained. However when I create plots using this Rdf (with no further filters applied), different plots will have different numbers of events (none of which match the event count after the rdfentry_ filter was applied). I was under the impression that rdfentry_ is a column in the Rdf which contains the entry number, am I misinterpreting this?
If rdfentry_ cannot be used in this manner, what is the best way to only keep 10% of the events in the Chain?
ROOT Version: 6.18/04