You might want to try calculating the Time_Between_Readmissions value in the script already and then use that field in the expression in your chart. It makes it kind of hard to "filter" the chart when you're using inter-record functions like above() at the same time to compare with other cells.
Thanks. Unfortunately, I don't have access to the script. I am using a QV application our organization makes available for self-service analytics. I may be able to request an enhancement to the script but can't create changes myself.
Is there any way to filter the chart using the results of inter-record functions?