An error occurred while saving the commentAndrew Inwood commented
Adding my comment and to this - the "dotproduct" suggestion below is one I'd love to see (array multiplication, or equivalent of Excel SumProduct (which can be implemented as DotProduct followed by a Total).
I thought that MapData(Array1,$val * MapData(Array2,val$)) might work, but it can't.
The use case for this for me is where we (for example) store related data in two arrays (eg. prodct flow and product yield), and want to determine the overall sum. I also see a significant benefit in being able to implement some correlations - eg. compressibility factor for gas compositions at P&T; coudl even allow a full calculation of meter performance (GHV, Z, SG, Mol Wt etc) against a composition.