reduce into buckets

[wheresrhys]

e.g. fetch data with an interval of d, then take a weekly average of the results

or bucket into users who are following 0, 1, 2-5, 5+ topics

perhaps

• ->reduce(timeframe,avg,every_5) = buckets every 5 events. Only really makes sense for time or similar series
• ->reduce(myft.follows,sum,0,1,2:5,6+). mostly makes sense for numeric. For continuous series it shoudl be a>=lower and a < higher

does it need another method name ->bucket()???

[wheresrhys]

Nice to have, but not urgent