QBO3 Matrix Filter does not sort as expected - rules

Question

I have two QBO matricies:
Matrix A has 1 input and 1 outputs,
Matrix B has 3 inputs and 1 outputs
When I navigate to Matrix A, I see something like this:
| Client | Price |
| ------ | ------ |
| | 120.00 |
| A,B,C | 100.00 |
| D,E | 90.00 |
| F | 95.00 |
when I enter E into the client filter, the Matrix sorts as I would expect, with the first row 'valid' and the others crossed out:
| Client | Price |
| ------ | ------ |
| D,E | 90.00 |
| | 120.00 |
| A,B,C | 100.00 |
| F | 95.00 |
Matrix B looks like this:
| Client | State | Investor | Price |
| --------- | ----- | -------- | ------ |
| | CA | NOT(2,3) | 100.00 |
| San Diego | CA | | 110.00 |
| | FL | | 95.00 |
| Miami | FL | 3 | 105.00 |
When I enter 'Miami' into the Client column filter, the sorting appears like this with all columns crossed out:
| Client | State | Investor | Price |
| --------- | ----- | -------- | ------ |
| | CA | NOT(2,3) | 100.00 |
| | FL | | 95.00 |
| San Diego | CA | | 110.00 |
| Miami | FL | 3 | 105.00 |
Why don't I see the row with Miami at the top?

Answer 1

In your second example, the row with Miami also requires State = 'FL', so that row is not a match. To get the Miami row to match, you must enter City = 'Miami' and State = 'FL'.
When the Matrix is evaluated, it calculates the following:
for each row of the matrix
for each input of the matrix
if the row has a value that equals your input, that's a 'match'
if the row has a value and you provided no input, that's a 'mismatch'
if the row has a NOT(value) and you provided no input, that's a 'match'
sort by
weight descending,
then by number of mismatches,
then by the number of matches
For the Matrix B output:
| Client | State | Investor | Price |
| --------- | ----- | -------- | ------ |
| | CA | NOT(2,3) | 100.00 | Mismatch = 1, Match=1
| | FL | | 95.00 | Mismatch = 1, Match=0
| San Diego | CA | | 110.00 | Mismatch = 2, Match=1
| Miami | FL | 3 | 105.00 | Mismatch = 2, Match=1
In short:
The 'Miami' line requires 3 inputs to match, and 2 did not, so it's at the bottom
the first line (CA) actually matches your 'empty' input because it just cares about the Investor NOT being Investor 2 or 3 -- no investor matches this requirement!