Hi Mikyo, got that working. appreciate the quick fix. At the back of that, got another query.
now i have two sets of data i want compare for drift. but essentially compare them on different time bins throough out the day.
right now, if i use days worth of data for data 1 as reference, each time bins of the primary data is used to compare to the entire refence data... this is very useful in most cases,, in my case, i would like to know how data 2 from 6pm - 7pm compares to data 1 from that same time bin.. ? How can that be achieved?