Aggregation of specific rows

Hello,

I have an ALV with sort rule and aggregation in some fields.

In one field the aggregation type is average. In some rows in the ALV the value in this field is 0. Now all rows included in the aggregation. I want to include in the aggregation only rows with value that different than 0 in that field.

How can I do that?

Thanks,

Ednri.