Hello

I'm trying to make a chart where, among other regular values, there's supposed to be a column or two with some IF-formulas, which returns some values or otherwise nothing.
The "nothing" bit has given me some problems, as the zero returned reads like a very low value indeed, with the chart line dropping accordingly. I've considered making it return the same value as the former cell, but that's not very pretty either. Does anyone know how to make it return something that the chart also perceives as absolutely nothing?
Appreciate any help
BCB