Excel formula -> how to change SUMPRODUCT formula to skip null cells -


context is using adjusted sumproduct formula calculate weighted average.

problem is sumproduct includes empty cells in arrays. => weighted average calculated incorrectly.

question is how edit sumproduct exclude empty cells in arrays?

alternatively there clean , neat solution?

in sumproduct, exclude empty cells, suppose you're using on range a1:a100, following:

= sumproduct((a1:a100),--(a1:a100<>""))

that second criteria ensure you're looking @ cells have value in them...

as explanation (a1:a100<>"") return array of true false, where, if there value in cell, returns true, otherwise, false. then, including -- before it, converts true/false 1/0. so, in effect, you're multiplying empty cells 0 (excluding formula) , non-empty cells 1 (including them in formula).

the --(logical statement array) useful trick use sumproduct() in many different ways!!


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