So I'm doing some power system analysis on active and reactive power loads and I'd like to compare the data from 2015 and data from 2015 to see how much they differ. The nature of the load is such that on same days in a week we have more or less a same load so I'd like to see how much does the load differ on let's say 8th of September 2015 and on 9th of September 2014, so on a Tuesday.
What thest could I use for this?
Thank you