I have an index formula where the array referenced varies, depending on other
conditions. For the sake of illustration, assume that the formula is
=INDEX(ARRAYx, row, column) and that ARRAYx can be any of ARRAY1-ARRAYn.

How do I build that into a formula? I've been playing with LOOPKUP formulae
with the name of the arrays being referred to but that does not seem to work.

Thanks
Henrik