How to calculate an average of three cheapest / most expensive products?

[f1234567]

Good Morning,

I have a question of how to calculate the average of  the 3 cheapest products in a list / respectively the three most expensive products in a list products with prices at a certain Date.

Example:

Dat	Product	Price
1.2.18	A	10,00
1.2.18	B	9,78
1.2.18	C	9,90
1.2.18	D	7,55
1.2.18	E	5,54
1.2.18	F	6,70
1.2.18	G	3,30
1.2.18	H	2,90
1.2.18	I	2,90
1.2.18	J	9,97
1.2.18	K	9,97
1.2.18	L	9,97
1.2.18	M	2,31
1.2.18	N	2,31
1.2.18	O	2,31
1.2.18	P	0,98
1.2.18	Q	0,99

As a result for the "average of the 3 most expensive" I would like to see:  Average = 9,98

Dat	Product	Price
1.2.18	A	10,00
1.2.18	J	9,97
1.2.18	K	9,97

(A+J+K )/3= 9,98

Remarks:

a) Although the Price of product "L" is the same as "J" and "K", it is not taken into account, because I only Need the first three cheapest products.

c) In case  there are only two products in the list, (e.g. at Date "Dat 1.3.18"  only Product A and B) the calculation should be A+B/2.

I have tried it in many ways, but without acceaptable results.

Thanks for your help!

[vishsaggi]

may be try like

Correction:

= Avg(Aggr(IF(Aggr(Rank(Sum(Price),4), Product)<=3, Sum(Price)), Product))

If date changes use this in aggr

= Avg(Aggr(IF(Aggr(Rank(Sum(Price),4), Dat, Product)<=3, Sum(Price)), Dat,Product))

[vishsaggi]

Another way is using Pivot table:

CheapestPrice:
LOAD *, Date(Date#(Dat, 'M.D.YY')) AS DateFormatted INLINE [
Dat, DatID, Price, Product
1.2.18, 43102, 0.98, P
1.2.18, 43102, 0.99, Q
1.2.18, 43102, 2.31, M
1.2.18, 43102, 2.31, N
1.2.18, 43102, 2.31, O
1.2.18, 43102, 2.90, H
1.2.18, 43102, 2.90, I
1.2.18, 43102, 3.30, G
1.2.18, 43102, 5.54, E
1.2.18, 43102, 6.70, F
1.2.18, 43102, 7.55, D
1.2.18, 43102, 9.78, B
1.3.18, 43102, 9.90, C
1.3.18, 43102, 9.97, J
1.2.18, 43102, 9.97, K
1.2.18, 43102, 9.97, L
1.2.18, 43102, 10.00, A
];

using Pivot table add

Dim:

Dat

= Aggr(IF(Aggr(Rank(Sum(Price),4), Dat, Product)<=3, Product), Product)

Price

Expr:

= Avg(TOTAL <Dat> Aggr(IF(Aggr(Rank(Sum(Price),4), Dat, Product)<=3, Sum(Price)/Count(Price)), Dat,Product))

you will see like below:

[f1234567]

Many thanks! Great!

Do you have a suggestion for the cheapest 3 products at a certain date? Something like "-"rank ?

[f1234567]

Great! Really good idea. Many thanks!!

Do you have a suggestion for the lowest 3 Prices as well?

[vishsaggi]

Yes just use - before the sum like

Dim:

Dat

= Aggr(IF(Aggr(Rank(-Sum(Price),4), Dat, Product)<=3, Product), Product)

Price

Expr:

= Avg(TOTAL <Dat> Aggr(IF(Aggr(Rank(-Sum(Price),4), Dat, Product)<=3, Sum(Price)/Count(Price)), Dat,Product))

[passionate]

Good way to identify lowest 3 avg.

[f1234567]

Many thanks! Very helpful.

[vishsaggi]

Can you close the thread accordingly if it answered your query.