Forum Discussion
Measures over groups
Hello,
I have a table with data regarding penetration of different media vehicles by city. I already have the first 4 columns shown below, and I want to calculate the last 3 columns:
| VEHICLE | CITY | PENETRATION | TOTAL_PEOPLE | %PENETRATION | NATIONAL_PENETRATION | AFFINITY |
| A | 1 | 120 | 253 | 47% | 46% | 103% |
| A | 2 | 82 | 231 | 35% | 46% | 77% |
| A | 3 | 71 | 190 | 37% | 46% | 81% |
| A | 4 | 94 | 122 | 77% | 46% | 167% |
| B | 1 | 80 | 111 | 72% | 60% | 121% |
| B | 2 | 400 | 414 | 97% | 60% | 162% |
| B | 3 | 113 | 350 | 32% | 60% | 54% |
| B | 4 | 76 | 245 | 31% | 60% | 52% |
| C | 1 | 350 | 372 | 94% | 80% | 117% |
| C | 2 | 234 | 315 | 74% | 80% | 92% |
| C | 3 | 123 | 168 | 73% | 80% | 91% |
| C | 4 | 345 | 454 | 76% | 80% | 95% |
The logic is as follows:
%PENETRATION = PENETRATION / TOTAL_PEOPLE (this is the penetration by city)
NATIONAL_PENETRATION = SUM(PENETRATION) / SUM(TOTAL_PEOPLE) for each vehicle (which is why the value gets repeated if we're refering to the same vehicle)
AFFINITY = %PENETRATION / NATIONAL_PENETRATION (it compares the penetration of one vehicle in one city, to the national penetration of that same vehicle)
I was able to calculate %PENETRATION and NATIONAL_PENETRATION using Measures, however when I try to calculate AFFINITY I'm not getting the result I want because I'm doing the average of NATIONAL_PENETRATION of all vehicles, and I don't know how to tell Power BI to do an average for each vehicle A, B and C. This is the formula I'm using:
AFFINITY =
DIVIDE(
[% PENETRATION],
AVERAGE('Table Name'[NATIONAL_PENETRATION])
)
I would appreciate any help or suggestions.
Best regards!
Hi yharfush,
Create the following measures:
% Penetration = SUM(Affinaties[PENETRATION])/SUM(Affinaties[TOTAL_PEOPLE]) National penetration = CALCULATE( [% Penetration]; ALLEXCEPT(Affinaties;Affinaties[VEHICLE])) affinity = [% Penetration]/Affinaties[National penetration]
This give the result below:
Regards,
MFelix
2 Replies
Hi yharfush,
Create the following measures:
% Penetration = SUM(Affinaties[PENETRATION])/SUM(Affinaties[TOTAL_PEOPLE]) National penetration = CALCULATE( [% Penetration]; ALLEXCEPT(Affinaties;Affinaties[VEHICLE])) affinity = [% Penetration]/Affinaties[National penetration]
This give the result below:
Regards,
MFelix
Thank you so much, MFelix! It works perfectly with the example I provided.
However, I would like to ask you if there is a way to integrate a condition into the ALLEXCEPT part of the formula. In my real data, I have a binary column that I'm using to filter the rows of my table, this is to indicate if that record belongs to a market or not. Because of this, the numbers I get for NATIONAL_PENETRATION are incorrect, I assume it is summing all values instead of only the ones that belong to the market. Do you know if this is possible?
Thank you so much :)
