Average Calculation for Available Data only

Hello Gurus,

I have a requirement where I have to calculate Daily average based on Hours (24 hours). We get one reading for every hour. SO 24 readings and divide them by 24. It works fine when I do a calculation like ([Measure]/24) as Hours would always be constant.

The problem comes when we miss some readings for few hours. In that scenario User do not want to take those hours into consideration for which reading is missing.

How can I achieve that?

Any suggestions?

Regards

Shalini