Summary Field that Averages Field Entries that are Less than Zero

I have a calculated field for the time over or under a deadline date. I want to create a summary field that summarizes the number of days overdue for projects completed after their deadlines.


Right now I'm trying =averageif([field name]:[field name],<0,[field name]:[field name])

I get an "Invalid Operation" error when I do this. Can someone give me some advice on a better approach?


Thanks!

Answers

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