Exp(Sum(Log))) Across Multiple Dimensions

[m_perreault]

Hi All,

I have the below data.

Date	Group	ID	Value1	Value2
1/31/2018	A	1A	110	100
1/31/2018	A	2A	130	115
1/31/2018	B	1B	260	215
1/31/2018	B	2B	275	250
2/28/2018	A	1A	175	150
2/28/2018	A	1B	130	110
2/28/2018	B	2A	150	125
2/28/2018	B	2B	180	140

I want to create a measure that multiples sum(Value1)/sum(Value2) across dates such as below.

Date	sum(Value1)/sum(Value2)
1/31/2018	1.139705882
2/28/2018	1.20952381
Product	1.378501401

I had been turned onto the Exp(Sum(Log))) method of calculating this but I am not seeing the values I am expecting.  I tried using Exp(Sum(Log(Value1/Value2))) and  Exp(Log(sum(Value1)/sum(Value2))) and still am not getting what I am looking for. 

Does anyone have any ideas?

Thanks!

Mark

[sunny_talwar]

You want to do this in a KPI object or a table object?

[jonathandienst · Accepted solution]

This is a nested sum, so you need an Aggr().Something like:

=Exp(Sum(Aggr(Log(Sum(Value1)/Sum(Value2)), Date)))