I have data in a table like this
Date | Serial Number | Reading
So i figured out how to get the diference between the 2 values as 3 for 5-2.
and i can run this now for all on one serial number but now i want average how much it changes with all 250 items. So i have 250 unique seril nubers. and the readings are all different numbers, but the differences are relatively close. I want to average the change between values. ANy one know how to do this?