Hi We have logs of images created in a series, like below. They are identified by a unique series id, the number of events for each series is variable. time_1 image_number:1 series_id:99999 time_2 image_number:2 series_id:99999 time_3 image_number:3 series_id:99999 time_n image_number:n series_id:99999 I need to calculate the average time for an image created, i.e. the total time (time_n - time_1)/n for each series. We have thousands of series every day.  Any tips on how I can achieve this? ... View more