Incorporating INDEX function into Array Formula (CNTRL-SHIFT-E
Hi excel monkey,
you have an interesting <finance post.
try this
=SUM((D16:D23)*(1+(B$1E16:E23)*LOOKUP(F16:F23,$A$ 27:$B$29))^((B$1-
E16:E23)*(B$1E16:E23)/365))
press ctrl-shft-ent for the {}
reminder: if your base date :B$1 is earlier than any date in range E16:E23
your real money on D16:D23 as calculated MAYBE decreasing as per the formula
<pls. verify your original formula by tweaking the dates
--
*****
birds of the same feather flock together..
"ExcelMonkey" wrote:
Actually I replaced the index with an HLOOKUP. So a simple HLOOKUP would
like this:
=D16*(1+LOOKUP(F16,$A$27:$B$29))^((B$1-E16)/365)
If you wrap it in a sumproduct and and array you get:
=SUMPRODUCT((D16:D23),(1+LOOKUP(F16:F23,$A$27:$B$2 9))^((B$1-E16:E23)/365))
And this works!
Thanks
EM
"ExcelMonkey" wrote:
That doesn't work correctly. . The reason I am doing this is that D16:D23
represents 7 separate costs items which have 1 of three esclation factors.
These three factors are epxressed in $B$27:$B$29. I want to be able to use
the index function to search out this variable for all 7 cost items and then
escalate these 7 items and add them together in the one formula. This is why
I am using the SUMPRODUCT. As written, the index applies one rate to all
seven numbers. I in fact have three separate rates which do not get applied
using this methodology.
EM
"Teethless mama" wrote:
=SUMPRODUCT((D16:D23)*(1+INDEX($B$27:$B$29,MATCH(F 16,$A$27:$A$29,0),1))^((B$1-E16)/365))
"ExcelMonkey" wrote:
I am using an index function to escaltate a value in real terms. For example:
RealValue * (1 + rate)^N = Nominal Value
Or as below
D16*(1+INDEX($B$27:$B$29,MATCH(F16,$A$27:$A$29,0), 1))^((B$1-E16)/365)
Or better defined as:
Real*(1+INDEX(list of escalation
types,row,column)^((currentdate-basedate)/365days)
D16 is the real value and everything else is the escalation.
This works fine. Problem I am having is that I now want to incorporate this
into an array formula. So instead of trying to find the nominal value of
D16. I want to find the nominal values of D16:D23. I am attempting to do so
by incorporating the INDEX function into a SUMPRODUCT function. I was trying
to incorporate it as follows:
=SUMPRODUCT($D$16:$D$23,Escalation)
I tried making the following changes to the indexation formula from this:
(1+INDEX($B$27:$B$29,MATCH(F16,$A$27:$A$29,0),1))^ ((B$1-E16)/365)
to this
(1+INDEX($B$27:$B$29,MATCH(F16:F23,$A$27:$A$29,0), 1))^((B$1-E16:E23)/365))
or as an array formula:
{=SUMPRODUCT($D$16:$D$23,(1+INDEX($B$27:$B$29,MATC H(F16:F23,$A$27:$A$29,0),1))^((B$1-E16:E23)/365))}
However this is not working. How do I do I incorporate an index formula
into this array formula?
Thanks
EM
|