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Biff
Not sure this is what you're looking for, but....
If you have a list of numbers in the range A1:A10:
Entered as an array - CTRL,SHIFT,ENTER:
=AVERAGE(IF(ISNUMBER(A1:A10-A2:A10),ABS(A1:A10-A2:A10)))
Biff
If you have a list of numbers in the range A1:A10:
Entered as an array - CTRL,SHIFT,ENTER:
=AVERAGE(IF(ISNUMBER(A1:A10-A2:A10),ABS(A1:A10-A2:A10)))
Biff