I need to filter the results of my array.

I have a column "DOI" that is a date and I need the array to only display
the blank/null values into my new sheet. ie. IF(DOI=Null, DOI)

I also need to be able to bring over the Incident and owner columns only if
the DOI column is blank.

I am assuming that it would be an IF statement for the array but am having
trouble getting it working.