How do I compute a 24 hour rolling average

Question

I need to compute a 24 hour rolling average for each individual subject.

I have the following columns:

Subject ID

Time stamp

Milk yeild

Can anyone help direct me in the right direction?

txnelson · Accepted Answer

Here is a simple script that creates your rolling average.  It creates a new column and uses a formula to generate the rolling average. Attached is a sample data table with the new column.  Please validate the calculations

Names Default To Here( 1 );
dt = Current Data Table();

dt << New Column( "Rolling Average",format("Percent",7,2),
	Formula(
		curTime = :Time stamp;
		curSubject = :Subject ID;
		Mean(
			:Milk yield[dt <<
			get rows where(
				:time stamp >= curTime - In Days( 1 ) & :time stamp
				 <= curTime & curSubject == Subject ID
			)]
		);
	)
);