@takashi I have a dataset like this:
DateValue01/01/2018201/01/2018001/05/2018301/12/2018102/01/2018302/02/20184I want to create an attribute for Daily Average Value in Each Month, and store the daily average (sum of values within each month ÷ number of days in that month).
The denominator is where I'm having trouble. Any suggestions on the best way to find the number of days within a given month?