There is an old post from 2003 with the same heading - you may wish to
have a look at the responses there as well. I am trying to make the
value of a cell blank as the result of a formula:

eg: =if(a13,BLANK,a2-a3)

If I use "" or nothing at all, I get a text value or 0 which when
graphed will graph as 0. I want these cells to be blank, so that if
they are referenced in a graph (or chart) they don't plot on the graph
at all. At the moment they are plotting as 0.

Any suggestions besides a macro which I think is overkill for my
purposes?

Thanks and Kind regards

Mick